Other Fabricated Metal Product Manufacturing (United States) — NAICS 3329

A Histometrics rollup primer for a general investing audience — public-market and private investors alike. NAICS (the North American Industry Classification System) is the U.S. government's standard code set for industries. This is a four-digit "industry group" that rolls up two five-digit children. Figures are reported facts with citations; statements about the future are labeled as expectations or judgments.

1. Overview

Within NAICS 332 (Fabricated Metal Product Manufacturing), code 3329 — Other Fabricated Metal Product Manufacturing is the catch-all box: the fabricated-metal factories that don't fit the tidier four-digit categories (structural steel, hardware, cutlery, springs, machine shops). It rolls up just two children, and they could hardly be less alike [1]:

• 33291 Metal Valve Manufacturing — a coherent product family. Everything here is a metal device that starts, stops, throttles, or protects the flow of a fluid: industrial valves, hydraulic and pneumatic valves, faucets and shower trim, pipe fittings and flanges [2].
• 33299 All Other Fabricated Metal Product Manufacturing — a definitional grab-bag. Under one code sit ball bearings, three kinds of weapons-and-ammunition manufacturing, industrial pipe fabrication, and a giant residual bucket of miscellaneous metal goods (safes, ladders, pallets, magnets, steel wool) [3].

Together they ship about $89.7 billion and employ roughly 257,000 people [4]. But the whole point of this primer is that 3329 is not a thing you can buy — it is a filing-cabinet label, and its distinctive value to an investor is the contrast between its two halves. One child is a real industry with shared raw materials, shared customers (the fluid-handling economy), and shared moats. The other is six unrelated businesses stapled together by the accident of being "made of fabricated metal and classified nowhere else." An investor who sees "$89.7 billion of other fabricated metal" and imagines a single market has already misread the level.

Three facts frame everything below.

• There is no pure-play stock for the level, and — surprisingly — the messier child still has the cleaner stock reads, though the gap has narrowed. The coherent valve child (33291) has no scaled U.S.-listed pure-play in any of its four sub-industries; you always buy valves as a segment of a diversified company, with faucets the nearest thing to a direct read (three listed vehicles, one of them newly identified in this pass) [2]. The grab-bag child (33299) still contains two niches — bearings and firearms — with genuine U.S.-listed pure-plays, and the foreign-listed door opened wider in January 2026 when Czechoslovak Group, owner of the number-two U.S. ammunition producer, began trading on Euronext Amsterdam [3].
• For most of both children the assets sit private, foreign, or government-owned, so public markets reach only a slice. Tickers, margins, and specific routes are reserved for Sections 4 and 10.
• 2025 pulled the level apart on margin — and it split along the same seam in both children. Certified, specified, or branded product earned well; commodity fabrication and consumer-cyclical weapons were squeezed. RBC Bearings ran a 22.5% operating margin [10] while Olin's Winchester ammunition segment collapsed to 3.9% [12]; inside valves, Flowserve's Flow Control Division earned 11.9% while Fortune Brands' water business earned 22.2% [6][7]. Knowing which engine you are buying now matters at least as much as knowing which product.

2. What's inside — the two children and how they differ

The contrast table is the heart of this rollup. The two children are ranked by share of the level's 2022 receipts; tickers are reserved for later sections.

CR4 = combined revenue share of the four largest firms. HHI = Herfindahl-Hirschman Index, a 0–10,000 concentration score; U.S. antitrust regulators treat below 1,500 as "unconcentrated."

Five contrasts do the real work of this level:

1. Coherence vs. grab-bag. 33291 is a genuine industry — brass, bronze, iron, steel, and nickel-alloy castings machined into fluid-control devices, nearly all sold into the same energy/water/building/machinery economy. 33299 has no shared end market; its bearings and its bombs have nothing in common but the census code. So the rollup pairs "a real industry" with "the residual of residuals."
2. The bigger box is the emptier one, per plant. 33299 is larger on both revenue (~59%) and jobs (~66% of employment), and it holds the vast majority of the level's factories (~82% of establishments) — because its misc-metal tail is thousands of tiny shops. Yet a valve plant is roughly three times the size of an average 33299 plant by revenue (~$32 million vs. ~$10 million), and a valve worker generates more revenue (~$418,000 vs. ~$314,000) [2][3][4]. Valves are the denser, more capital-intensive industrial base; all-other is a long fragmented tail with a few large defense and bearing plants at the top.
3. The investability inversion — still real, but narrowing on both sides. The coherent child has no scaled listed pure-play: valves arrive as a segment inside Emerson, Parker, Masco, or Mueller. What the revised child adds is a third listed faucet read (Zurn Elkay, for commercial and institutional specification demand) and a listed pipe-valve-and-fitting distributor (Core & Main), so the public surface is wider than the prior version of this page implied — but none of it is a pure-play [2][7][9]. The grab-bag child still hands public investors two clean U.S. pure-play niches — bearings (Timken, RBC Bearings) and firearms (Sturm Ruger, Smith & Wesson) — and now adds foreign-listed near-direct access to ammunition and small arms through CSG N.V. on Euronext and Colt CZ in Prague, even as AMMO Inc.'s April 2025 exit from manufacturing removed the last small U.S.-listed ammunition maker [3][10][11][13]. If you want a stock that trades on its own product, you still look in the messier bucket.
4. Regulation spans two worlds. 33291 is governed by product standards and water-safety law — pressure ratings, lead-free drinking-water certification, hydraulic specs. 33299 adds an entire weapons regime on top — firearms licensing, arms-export control, and national-security review of foreign buyers. The rollup stretches from plumbing code to gun-control politics (Section 7).
5. What actually unites them — now three things, not two. Both are derived demand (they follow the machines, buildings, and budgets they feed, not a consumer whim). Both live and die on metal input cost plus steel, aluminum, and copper trade policy — the one lever that moves every corner of the level at once, and which stopped being a single headline number during 2026 (Sections 5, 7, 9). And the revised children now converge on a third: the profit is in the certificate, not the metal. In both halves, the operators earning good returns are the ones whose product is qualified, specified, or branded — aerospace bearings, severe-service valves, premium faucets, code-welded pipe spools — while commodity fabrication is a price-taking business at either end of the level [2][3].

3. Size — the level's rollup figures

Our ground-truth federal statistics for the whole NAICS 3329 group [4]:

How the children add up. The two receipts figures sum to about $89.73 billion — matching the level almost exactly; establishment counts sum precisely to 6,287; and employment sums precisely to 256,679 [2][3][4]. One number does not simply add: the two children's firm counts total 5,541, but the group reports 5,508, because the ~33 firms that manufacture in both valves and all-other are counted once at the group level — a reminder that even these two very different boxes share some corporate parents [4]. One vintage note from the revised research: inside 33299, bearings shipments are now published on the 2023 Annual Integrated Economic Survey basis while its other five industries remain 2022 Economic Census figures, so that child's internal receipts no longer tie out to the decimal — but its group total is still the 2022 Economic Census number, so the rollup above is unaffected [3].

Concentration is extraordinarily low — and the number is a trap. The group HHI is just 59.5, with the top four firms holding only 11.1% of shipments — lower than either child on its own (valves 192.1, all-other 83.4) [2][3][4]. That is not evidence of a hyper-competitive single market; it is the arithmetic of bundling two unrelated things. The leader in valves (an Emerson or a Masco) makes none of the leader's product in all-other (an Olin or a General Dynamics), so no firm looms large over the combined base. Read the level HHI as "two separate markets — themselves bundles of ten unrelated sub-industries — pooled together," never as "a free-for-all." Real concentration lives down at the sub-industry level, and the revised children make the spread precise: it runs from a four-firm share of 8.1% in miscellaneous metal (HHI 40.9, near the statistical floor) to 87.1% in large-caliber ammunition [3]. Crucially, each child hides an oligopoly: faucets inside the valve child are a tight branded oligopoly at CR4 63.9% (top eight 83.1%), and small-arms ammunition inside the grab-bag child runs CR4 75.4% with an HHI of 1,766 [2][3]. A low number at this level tells you nothing about the market you would actually be buying.

Undercount caveat. These figures measure U.S. merchant factory output, and they understate the economic footprint an investor cares about — with the gaps stacking from both children and all running toward understatement:

• Imports. A large share of U.S. consumption — faucets and commodity fittings in valves; bearings and ammunition in all-other — is made abroad and never appears in domestic shipments. The revised research sizes two of these: private estimates put the U.S. ball-bearing market near $8 billion against ~$6.0 billion of domestic factory output, and the U.S. ammunition market near $7.7 billion against $5.83 billion of factory shipments [2][3].
• Diversified and off-code parents. The biggest producers are multi-product multinationals whose valve or bearing output is often booked inside plants classified under broader codes, and whose segment revenues include foreign-made goods and non-U.S. sales; a company segment never equals a NAICS number [2][3].
• Government munitions are largely invisible. Much military ammunition flows through government-owned, contractor-operated (GOCO) plants — Lake City, Holston, Radford, Scranton, Iowa — and government-owned, government-operated arsenals, funded via defense appropriations rather than commercial factory receipts, so the weapons sub-industries understate real activity [3].
• Captive pipe fabrication done in-house by industrial contractors is counted under construction, not manufacturing — and the revised child shows how large that gap is: Turner Industries alone runs over 450,000 square feet of fabrication shop and can turn out more than 10,000 pipe spools a month, entirely outside the ~$8.0 billion merchant pipe-fab line [3][16]. The high-margin aftermarket, repair, and distribution economy around valves and bearings likewise sits in trade and service codes, not here [2][3].

Crucially, there is no offsetting overcount from gig, informal, or individual operators: this is a genuinely employer-based, factory-payroll level, so the Census captures the plants that exist reliably. The gap is imports, off-code output, government munitions, captive fabrication, and the service layer — not undercounted small owners.

4. Investable universe — where the value concentrates

The defining fact for the level: no pure-play exists for 3329, and clean U.S.-listed pure-plays exist for only two of the ten sub-industries beneath it — both inside the grab-bag child. Public value concentrates in a handful of niches; everything else is diversified, foreign, private, or government-owned.

Inside 33291 Metal Valve — value reaches markets only as a segment:

• Energy & process valves: Flowserve (NYSE: FLS) is the closest thing to a flow-control pure-play — its Flow Control Division ran ~$1.51 billion at a 29.6% gross and 11.9% operating margin; Emerson Electric (NYSE: EMR) owns the highest-quality franchise (Fisher control valves, Crosby relief valves) inside a Final Control segment at ~$4.38 billion of sales and ~$1.08 billion of segment earnings; Crane (NYSE: CR) sells ~$948 million of process valves inside a $1.26 billion segment earning 21.0%; Mueller Water Products (NYSE: MWA) is the waterworks angle at ~$825 million and a 35.9% gross margin [6]. Curtiss-Wright (NYSE: CW), ITT (NYSE: ITT), and Baker Hughes (NASDAQ: BKR) carry further process, nuclear, and naval valve exposure [2].
• Fluid power (hydraulics/pneumatics): Parker Hannifin (NYSE: PH), the ~$19.9 billion motion-and-control leader running a 23.0% segment operating margin, is the cleanest large-cap read; Gates Industrial (NYSE: GTES) is more directly hydraulics-levered (Fluid Power ~$1.30 billion at a 22.4% adjusted EBITDA margin, aftermarket $932 million versus $364 million OEM); Helios Technologies (NASDAQ: HLIO) is the cartridge-valve read at ~$541 million and a 16.9% operating margin [6].
• Faucets & plumbing trim — the one place with a nearly-direct read, and now three of them: Masco (NYSE: MAS; Delta, Brizo, Hansgrohe) at $4.99 billion and a ~17.9% operating margin, Fortune Brands Innovations (NYSE: FBIN; Moen, House of Rohl) at $2.45 billion and ~22.2%, and — added by the revised child — Zurn Elkay (NYSE: ZWS) at $1.70 billion and 16.4%, the listed read on commercial and institutional specification demand rather than residential remodeling [7]. The strongest single residential operator, Kohler (~$7 billion), is private [7].
• Building/water valves & fittings: Mueller Industries (NYSE: MLI), whose Piping Systems segment did $2.71 billion at a 28.5% operating margin — flattered by $41 million of insurance and $15 million of asset-disposal gains — and Watts Water Technologies (NYSE: WTS) at $2.44 billion, a 49.5% gross and 18.4% operating margin [8]. Note a live disagreement: the two children report Mueller Industries' total 2025 revenue differently — ~$3.76 billion in the valve child and ~$4.2 billion in the all-other child, both citing the same 10-K. We leave it standing rather than split it [2][3].
• Distribution: Core & Main (NYSE: CNM) reported $7.65 billion of sales including $5.14 billion of pipes, valves, and fittings (~67%) at a 26.9% gross margin — infrastructure distribution economics with substantial metal pass-through, not valve-manufacturing economics [9]. Beneath all of these sit large private and PE owners (Bray International, KKR's CIRCOR, NIBCO, Victaulic, Viega) and a deep bench of family brass foundries [2].

Inside 33299 All Other Fab. Metal — two clean U.S. stocks, one new foreign listing, then it goes private:

• Bearings (332991): Timken (~$4.6 billion of global sales; Engineered Bearings $3.018 billion at an 18.9% adjusted EBITDA margin) and RBC Bearings (fiscal 2026 net sales $1.871 billion, 44.4% gross and 22.5% operating margin) — the only U.S.-listed pure-plays in the entire level that trade on their own product, and RBC's aerospace/defense tilt produces the level's best returns [10].
• Firearms (within 332994): Sturm Ruger and Smith & Wesson remain the two listed ways to own gun manufacturing, and both are now in a trough — Ruger's FY2025 net sales were $546.1 million against a $0.27 diluted loss per share, and Smith & Wesson's FY2025 sales fell 11.4% to $474.7 million with net income of $13.4 million [11].
• Ammunition (332992): Olin Corporation is still the sole meaningful U.S. listing — Winchester supplied $1.725 billion of Olin's $6.781 billion of 2025 sales, with segment income of just $67.7 million [12]. The genuinely new route is CSG N.V., owner of the Kinetic Group (Federal, CCI, Speer, Remington) and Fiocchi, which began trading on Euronext Amsterdam in January 2026 — broader small-caliber exposure than Olin, but bundled with medium- and large-caliber ammunition, vehicles, and aerospace, and carrying foreign-market currency, withholding, and liquidity considerations [13]. Prague-listed Colt CZ (403,000 firearms sold in 2025, up 8.4%) adds small-arms exposure [13].
• Large-caliber ammunition (332993): no pure-play — exposure comes through diversified defense primes General Dynamics (Combat Systems ~$9.2 billion at a 14.4% operating margin, with weapon systems and munitions roughly $3.1 billion inside it) and Northrop Grumman, plus foreign-listed BAE Systems and Rheinmetall [14][3].
• Pipe fabrication (332996) and misc metal (332999): still no clean pure-play, but the revised child identifies a closer analogue than this page previously carried — Perma-Pipe International (~$211 million of revenue at a 33% gross margin, though ~72% of sales are outside the U.S.) — alongside the liquid proxies Mueller Industries and distributor DNOW (~$5.4 billion combined after MRC Global) [16]. For misc metal the touchpoints are diversified industrials (Worthington, Zurn Elkay, nVent, Standex) and micro-caps; the genuine specialists are private [3].

The cross-cutting read for stock pickers: because almost everything here is a segment, judge these names on segment operating margin, aftermarket/replacement mix, bookings and backlog, and end-market diversification — never on a "valve multiple" or a "fab-metal multiple," neither of which exists. And do not read the segment margins above across companies too literally: differences in product mix, geographic scope, segment overhead, and acquired-intangible amortization prevent a clean comparison, let alone a NAICS-level one [2]. For private capital the level is unusually rich: fragmented manufacturing tails, asset-light distribution and repair networks in valves and bearings, thousands of retiring owner-operators in pipe fab and misc metal, and control positions in the private and foreign ammunition base — far more directly investable than the thin public surface suggests.

5. How the money works

Under one shared model — buy metal, add fabrication, sell for more — the level houses distinct economic engines, and 2025 separated them more sharply than the prior version of this page could show.

• In 33291 (valves), the durable edge is being specified in and certified. An industrial valve on an operator's approved-vendor list, a hydraulic cartridge designed into a machine platform, a faucet certified lead-free, or a fitting approved to drinking-water code all create switching costs and pull years of reorders and replacements — a real barrier against low-price imports. The recurring cushion is the aftermarket: industry estimates put replacement and maintenance-repair-and-overhaul (MRO) at roughly 50–55% of industrial-valve demand, while fluid-power channels run roughly two-thirds original-equipment — though that rule of thumb does not describe individual franchises, since Gates' Fluid Power segment reported $932 million of aftermarket sales against $364 million of OEM [2][6]. Faucets add a consumer-brand lever — premium finishes and connected features lift price and mix — that the rest of the level lacks [7].
• In 33299, three engines run side by side, and 2025 pulled them apart [3]. (a) Cyclical industrial (bearings, pipe fab, misc metal): money is made on capacity utilization × volume × price, minus steel; full plants mint cash, idle ones bleed, and the profits sit in certified specialty product — RBC at 44.4% gross and 22.5% operating against commodity fabrication where price-taking is the rule [10]. (b) Consumable boom-bust (ammunition and the commercial half of small arms): a round is destroyed when fired, giving razor-and-blades recurring demand — but pricing whipsaws with buying panics, and this pass caught the downswing in full, with Winchester's segment margin falling 16.9% → 14.1% → 3.9% across 2023–2025 and Ruger's operating margin 17.3% → 9.6% → 5.9% across 2022–2024 [11][12]. An 11% federal excise tax is baked into every domestic sale [20]. (c) Contract-and-backlog defense (large-caliber ammo): revenue is set by funded backlog, not an open market — Winchester alone carried $1.331 billion of contractual backlog at January 31, 2026 — and at GOCO plants the government owns the buildings and machines, so the contractor earns a capped management fee rather than a full product margin. Realized defense margins cluster in the low-to-mid teens (General Dynamics' Combat Systems at 14.4%), and the binding constraint is energetics, not demand: the U.S. has produced no domestic TNT since 1986 [12][14][3].
• What both children share. Cost of goods is dominated by metal — brass, copper, ductile iron, steel, nickel alloys — plus castings and forgings, so margin depends on passing price through on a lag, and on fixed-price work a metal or tariff move between bid and delivery can erase it outright [2][3]. Both are fixed-cost foundry and machining operations, acutely sensitive to how full the plants run. The single lever that moves every corner of 3329 at once is metal input cost and trade policy (Section 7) — and what the revised children add is that the lever's direction now differs by engine: the certified and contracted ends absorbed 2025's cost inflation; the commercial-consumer end could not.

6. Demand drivers

Demand is derived across the whole level — it tracks end markets, not consumer whim — but those end markets barely overlap between the children, which is exactly why the two halves rarely move together.

• Fluid, energy, and building infrastructure (drives 33291): the revised child corrects a common misread — industrial valves are not a pure oil-services play. A trade-association forecast puts chemicals at 17.9% of shipments, water and wastewater 16.3%, petroleum production 13.1%, power generation 11.7%, and refining 11.3%, and Flowserve's 2025 bookings split energy 32% / chemical 27% / general industries 25% / power 16% [2][6]. On that base sit the U.S. LNG export build-out, gas-fired power for data-center load, nuclear life-extension, the industrial capital-spending cycle for fluid power, housing repair-and-remodel and interest rates for faucets, and federally funded water renewal for waterworks valves [2].
• Defense budgets, industrial capex, and construction (drive 33299): the industrial capital-spending cycle for bearings and pipe fab (with LNG and data-center gas power a fast-growing pull on pipe fabrication), the aftermarket/replacement base for bearings, and — the level's clearest single growth story — Ukraine-driven artillery restocking and NATO rearmament, backed by a 15-year, $18.1 billion U.S. Army modernization program [3][14]. The civilian weapons cycle is now running the other way: NSSF-adjusted background checks fell two years running, to 15.2 million in 2024 and 14.6 million in 2025, well off pandemic peaks, and ATF data show 9.77 million firearms entering commerce in 2023 against 13.4 million in 2022 [20].
• The two shared structural threads. First, federal water money supports the water-facing corners of both children: the 2021 Infrastructure Investment and Jobs Act (IIJA) directs more than $50 billion through the EPA — including $11.7 billion each to the drinking-water and clean-water revolving funds and $15 billion specifically for lead-service-line replacement — against an EPA-assessed $625 billion of 20-year drinking-water infrastructure need [19]. (Authorization is not revenue: projects convert over several years [2].) Second, the replacement/aftermarket cycle — worn valves, spent bearings, consumed ammunition — remains the most reliable demand source across the entire level, cushioning the capital-spending swings in every part of it.

7. Regulation

No single agency licenses this level; instead it straddles two regulatory worlds that share exactly one lever.

The universal lever — steel, aluminum, and copper trade policy (touches both children), and it is no longer one number:

• Section 232 national-security tariffs on steel and aluminum were raised to 50% in June 2025 and extended to "derivative" downstream products — pulling in pipe fittings (Harmonized Tariff Schedule heading 7307, where stacking with Section 301 China duties put some Chinese steel fittings near 75%) and bearing parts such as races, cages, and rollers, alongside the valves and castings every firm buys. A separate 50% tariff on semi-finished copper and copper-intensive products took effect in August 2025, with reported plumbing-goods price increases of 15–35% [5].
• The regime then changed again in June 2026, and the two children describe it differently. The valve child reads the June 2026 proclamation as setting a 25% additional rate for defined lists through the end of 2027, subject to specified exceptions; the all-other child reads it as a restructuring into product-dependent, full-value tariff categories including 50%, 25%, and temporarily reduced 15% rates, with later annex revisions [2][3][5]. We leave both readings standing, because they agree on the consequence that matters here: there is no longer a single headline rate for this level, coverage follows a product's customs classification rather than its industry code, and whether a particular valve, casting, fitting, or bearing part falls inside an annex is a per-part legal question. For fabricators that converts a known cost into a quoting, sourcing, and inventory risk [2][3].
• Product-specific duties and domestic-content rules add a second layer: antidumping orders on tapered roller bearings from China (maintained on sunset review in 2024) and on carbon-steel and forged steel pipe fittings, and Build America, Buy America rules steering IIJA water dollars to U.S. makers [3][19].
• Relief does not arrive quickly. The bearing industry's own submission to the Commerce Department notes that tariffing more than $2 billion a year of imported bearing components raises costs for U.S. assembly and downstream defense, infrastructure, and medical customers — and that qualifying an alternative component supplier can take nearly two years [21]. That qualification lag is the practical reason tariff protection does not translate into fast domestic substitution anywhere in this level.

The industrial-standards world (governs 33291 and the industrial corners of 33299): product certifications that buyers treat as mandatory and that function as competitive moats — American Petroleum Institute and ASME (American Society of Mechanical Engineers) pressure and valve standards, plus fugitive-emissions "low-E" certification; American Water Works Association standards for municipal product; ASME B31 pressure-piping codes and Section IX welder qualification for pipe fabrication (a welder's qualification lapses after six months of not using the process); NSF/ANSI drinking-water lead-free certification (weighted-average ≤0.25% lead) for faucets and plumbing valves; and aerospace quality systems (AS9100) for bearings [2][3]. The certification burden is the barrier to entry.

The weapons world (governs the three ordnance sub-industries of 33299): an entire regime the valve child never touches — firearms and ammunition manufacturing licensing through the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF); the 10%/11% federal excise tax funding wildlife conservation under Pittman-Robertson; arms-export control (ITAR and the Commerce Department's EAR); defense-contracting rules (DFARS, facility clearances); the Protection of Lawful Commerce in Arms Act liability shield and the state statutes testing its edges; and CFIUS national-security review of foreign acquisitions in the ammunition base, which cleared the CSG–Kinetic deal [3][20]. One targeted change landed this pass: the National Firearms Act's $200 transfer tax on suppressors, short-barreled rifles and shotguns, and "any other weapons" fell to $0 effective January 1, 2026 (registration retained; machine guns and destructive devices excluded) — a modest boost to a category that was already 83% of NFA manufacturing [20][3]. This remains the sharpest regulatory contrast in the whole rollup: at one end of 3329, drinking-water lead limits; at the other, munitions-export licensing and gun-control politics.

8. Consolidation

The level is fragmented at the top (CR4 11.1%, HHI 59.5), and consolidation is active in both children — but along different paths and toward different buyers [4].

• In 33291 (valves): strategics buy their way into certified, specialty, or branded niches while private equity assembles platforms from the fragmented middle and the asset-light distribution and repair layer. The revised child adds a considerably busier 2024–2026: KKR took CIRCOR private in 2023 (the child's own sources put the headline at $1.6–1.7 billion and it leaves the discrepancy standing); Flowserve bought severe-service specialist MOGAS (~$305 million, 2024), then agreed to merge with Chart Industries, was outbid by Baker Hughes — collecting a $266 million break fee — and instead bought Trillium Flow Technologies' valves division for $490 million (closed 2026); Baker Hughes also bought Continental Disc ($540 million, 2025); Valmet completed its purchase of ValvTechnologies on July 1, 2026; Danfoss bought Eaton's hydraulics business ($3.3 billion, 2021) and Bosch Rexroth bought HydraForce (2023); ASSA ABLOY acquired the Pfister-owning hardware division ($4.3 billion, 2023); and NIBCO rolled up brass-valve makers while Aalberts holds Apollo/Conbraco [2][17].
• In 33299 (all-other): three distinct patterns. Scale-and-foreign roll-up in ammunition — Czechoslovak Group's purchase of the Kinetic Group closed in November 2024 at a final transaction value of $2.225 billion (announced at ~$2.15 billion), which with German-owned SIG Sauer shifted much of the base into foreign hands under CFIUS scrutiny — and then partly back into public hands, since CSG itself listed on Euronext Amsterdam in January 2026 [13]. Government-engineered new entry in large-caliber munitions — the Pentagon is funding Rheinmetall, Nammo, and Repkon to stand up new U.S. capacity, on top of more than 100 ammunition-plant modernization projects worth $1.5 billion already in execution [3][15]. Serial acquisition and lower-middle-market roll-up elsewhere — RBC bought ABB's Dodge bearing business ($2.9 billion), Arcline took aerospace-bearing specialist Kaman private for $1.8 billion in 2024, and pipe fabrication and misc metal remain textbook fragmented roll-up plays with M&A concentrated downstream (DNOW's ~$1.5 billion purchase of MRC Global) and in niche brands (Monomoy/Liberty Safe, Triton/WernerCo) [16][18].

The common thread across the whole level: value migrates to specialized, certified, or branded niches, and consolidation is the mechanism — strategics and foreign capital buying the concentrated corners, PE and search funds assembling scale where none yet exists. But the revised children add a corrective that belongs at this level, because it now shows up on both sides: all this deal activity has barely moved measured fragmentation. Other Metal Valve went from 238 companies, a CR4 of 19.8%, and an HHI of 217.4 in 2002 to 175 firms, 21.1%, and 230.5 twenty years later; fabricated pipe went the other way entirely, its HHI falling from 194.7 to 111.5 and CR4 from 23.2% to 14.7% over the same span [2][3][23]. Roll-ups here consolidate ownership faster than they consolidate share.

9. Risks

The two children share a risk core and diverge on emphasis:

• Cyclicality — no longer hypothetical (both, uneven). A capex or manufacturing downturn hits factory utilization and margins fast — sharpest in fluid power (valves) and in bearings, pipe fab, and commercial guns/ammo (all-other). On the commercial weapons side the 2024–25 normalization has already compressed margins to multi-year lows at both Winchester and Ruger [11][12]. The aftermarket cushions every corner but eliminates the cycle in none.
• Metal-cost and tariff whipsaw (both). Section 232 protection inflates input costs as it shelters domestic sellers; on fixed-price work a steel or copper move between bid and delivery can erase the margin [5].
• Trade-policy volatility, now distinct from tariff level (both). The schedule was raised in June 2025, expanded in August 2025, and reset again in June 2026 — three material changes in roughly twelve months — and coverage is now determined product by product through customs classification. That is a planning, quoting, and inventory risk on top of the cost itself [5][2][3].
• Import competition (both). Low-cost imports pressure the commodity tails hardest — faucets and fittings in valves; commodity bearings and generic fabricated goods in all-other — and counterfeit bearings are a distinct quality, warranty, and national-security exposure flagged by the industry itself [21].
• Substitution (both, and understated in the prior version of this page). Plastics — PVC, CPVC, PEX — are the principal substitute for metal plumbing fittings, and Mueller Industries identifies their share as increasing; in fluid power, electrification of actuation is a slow, real threat to parts of the hydraulic-valve franchise, though the trade association's own assessment is that electrified machines often retain hydraulic work functions and demand more sophisticated electro-hydraulic content [2][8].
• Channel and customer concentration (both, newly emphasized). Downstream buyers hold real leverage: Home Depot and Lowe's each represented 11% of Fortune Brands' 2025 sales and together 21% of its water-segment sales; Watts sold 66% of 2025 revenue through wholesalers; and distribution itself has consolidated into a few names [7][8][9].
• Labor and foundry capacity (both) — real, but narrower than the headline. Skilled machinists, welders, and foundry workers are scarce and capacity is not quickly added, but the revised children temper the framing: the Bureau of Labor Statistics projects ~34,200 annual machinist and tool-and-die openings and ~45,600 annual welder openings through 2034 against roughly flat-to-declining employment — a retention and training problem rather than a growth-driven shortage, and not a source of blanket pricing power [22].
• Defense-specific execution risk (33299 only), and it has worsened. The large-caliber build-out rests on appropriations that can lapse and on ramps that have slipped badly: a July 2026 Inspector General report found a new 155 mm plant built with $469 million had produced no conforming metal parts roughly two years on, and the Army was making about 36,000 rounds a month in early 2026 against a 100,000 goal. Concentrated energetics sourcing compounds it — the first new domestic TNT plant in four decades is not due until roughly 2028 [15][3].
• Political, legal, and ESG friction (33299 weapons only). Gun-control legislation, ammunition taxes, litigation, and exclusion screens can dent demand and narrow the investor base — a risk the valve child does not carry — even as the threat of restriction perversely pulls sales forward [3].
• Not a stand-alone equity (both). Outside two bearing and two firearm names, public investors cannot isolate any of these exposures — you buy a diversified company and get valves, or bearings, or ammunition as one diluting ingredient.
• Data fragility (both catch-alls). As residual "not-elsewhere-classified" codes, both the misc-metal sub-industry (which absorbed the former 332997 and 332998) and the 3329 group itself see firm and establishment counts shift with reclassification — an analytic, not operational, caveat [3].

10. How to invest, and the outlook

Match the vehicle to the corner you actually want (tickers for the how-to-invest question only; treat prices, yields, and multiples as items to check at the time of any decision):

• Fluid/energy/building exposure (33291): Flowserve (FLS), Emerson (EMR), or Curtiss-Wright (CW) for energy, process, and nuclear valves; Parker Hannifin (PH), Gates (GTES), or Helios (HLIO) for fluid power; Masco (MAS) and Fortune Brands Innovations (FBIN) for residential faucets and trim, with Zurn Elkay (ZWS) for the commercial and institutional specification layer; Mueller Industries (MLI) and Watts Water (WTS) for building/water valves and fittings; and Core & Main (CNM) if you want the distribution layer rather than manufacturing economics [6][7][8][9].
• Industrial exposure inside 33299: bearings pure-plays Timken and RBC Bearings — the cleanest listed way to own anything in the whole level — plus Perma-Pipe as the closest listed pipe-fabrication analogue and Mueller Industries and DNOW as the liquid proxies [10][16].
• Weapons/defense exposure inside 33299: firearms pure-plays Sturm Ruger and Smith & Wesson, both currently earning trough margins; Olin for the one meaningful U.S. ammunition exposure; new this cycle, CSG N.V. on Euronext Amsterdam and Colt CZ in Prague for foreign-listed access to the ammunition and small-arms base; and diversified primes General Dynamics and Northrop Grumman (plus BAE Systems and Rheinmetall abroad) for large-caliber munitions [11][12][13][14].

Valuation metrics vary enormously across these engines and belong to company-level due diligence; aerospace- and defense-tilted names typically trade richer than commodity-industrial ones. There is no "3329" fund, and many mainstream and ESG funds deliberately screen out firearms and, sometimes, defense.

Private-market routes are where most of the level actually lives, and in most corners they are richer than the public options: buying or backing regional valve, brass-foundry, bearing, or pipe-fab shops positioned for Buy-America demand; the recurring, capital-light distribution and repair networks in valves and bearings (the standard PE roll-up target); the fragmented small-shop tails of pipe fabrication and misc metal, with thousands of retiring owner-operators; and control positions in the private and foreign ammunition base. On the defense side, owning the shells is gated by clearances, ITAR, and government-owned plants, so the private angle is "feeding the ramp" — forgings, propellant, energetics, and automation. The children converge on what makes a defensible target in either half: an installed base, approved-vendor positions and certification or welder-qualification libraries, proprietary or hard-to-machine designs, distributor relationships, and meaningful aftermarket revenue — with diligence separating true organic volume from metal-price pass-through, and, for anything touching government work, checking whether backlog is funded and who owns the tooling and technical data [2][3].

Near-term outlook (forward-looking, not guaranteed). The level's virtue is that it is diversified across cycles that rarely align. Inside valves, the setup is constructive — LNG, gas-power, nuclear, chemical-reshoring, and water tailwinds, with fluid power past its 2024–25 trough and industry forecasters flagging a possible 2026 recovery, and faucets modest and rate-dependent with a replacement cushion [2]. Inside all-other, the clearest structural grower is still large-caliber ammunition — but the revised research sharpens the caveat rather than the promise: production near 36,000 rounds a month against a 100,000 goal, a TNT bottleneck that does not clear until roughly 2028, and fee-capped GOCO economics make it a thematic overweight inside diversified defense holdings, not a standalone bet [15]. Pipe fabrication has the level's most favorable multi-year demand set-up (LNG, data-center gas power, $625 billion of assessed water need, reshoring) [19]; bearings ride aerospace recovery and automation on a cyclical base, with wind now a drag; the commercial gun-and-ammunition corner is past simple volume normalization and into a genuine margin trough — a cyclical-timing story, not a growth one; and misc metal is demand-steady, margin-squeezed, and a consolidation play [3]. Across the entire level, the 2026 tension has shifted in an important way: metal protection is no longer a single 50% number but a product-by-product schedule keyed to customs classification, which still shelters domestic sellers, still keeps input costs elevated, and now adds administrative and quoting risk on top — so the winners are the specialized, certified, backlog-rich, and branded operators, and value concentrates ever more tightly in those niches rather than in commodity fabrication [5]. The swing factors to watch are the energy and industrial capital-spending cycles, defense appropriations and ramp execution, housing rates, metal costs and the tariff path, and foundry/casting capacity. These are judgments about direction; the ground-truth federal figures in Section 3 are the reported facts.

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Sources

1. U.S. Census Bureau, 2022 NAICS — Industry Group 3329 Other Fabricated Metal Product Manufacturing and its constituent industries 33291 (Metal Valve) and 33299 (All Other Fabricated Metal Product) (definitions and structure), 2022. https://www.census.gov/naics/
2. Histometrics child primer, Metal Valve Manufacturing (NAICS 33291) — four-industry structure, ownership, end markets, standards, trade-policy sequence, substitution, and M&A; 2022 Economic Census / 2023 County Business Patterns figures (receipts $36.65B; 893 firms; 1,136 establishments; 87,679 employees; payroll $6.52B; CR4 20.8%, CR8 29.6%; HHI 192.1) and child concentration (332911 CR4 22.6% / HHI 244.8; 332912 CR4 38.4%, HHI suppressed; 332913 CR4 63.9%, CR8 83.1%; 332919 CR4 21.1% / HHI 230.5), 2026.
3. Histometrics child primer, All Other Fabricated Metal Product Manufacturing (NAICS 33299) — the six-industry grab-bag (bearings, three ammunition/ordnance industries, pipe fabrication, misc metal); ownership, standards, defense economics, tariff restructuring, and M&A; 2022 Economic Census / 2023 County Business Patterns figures (receipts $53.08B; 4,648 firms; 5,151 establishments; 169,000 employees; payroll $12.27B; CR4 13.4%, CR8 20.7%; HHI 83.4) and child concentration (332999 CR4 8.1% / HHI 40.9; 332994 CR4 34.4% / HHI 427; 332996 CR4 14.7% / HHI 111.5, versus 23.2% / 194.7 in 2002; 332992 CR4 75.4% / HHI 1,766; 332991 CR4 49.7% / HHI 900; 332993 CR4 87.1%, HHI suppressed), 2026.
4. Histometrics ground-truth federal statistics, NAICS 3329 Other Fabricated Metal Product Manufacturing — 2022 Economic Census (receipts $89,731,875K; 5,508 firms; CR4 11.1%, CR8 16.6%, CR20 27.8%, CR50 43.6%; HHI 59.5) and County Business Patterns 2023 (6,287 establishments; 256,679 employees; annual payroll $18,789,169K). U.S. Census Bureau.
5. Trade policy — the Section 232 sequence: The White House, Adjusting Imports of Aluminum and Steel into the United States (rate raised to 50%), June 2025, https://www.whitehouse.gov/presidential-actions/2025/06/adjusting-imports-of-aluminum-and-steel-into-the-united-states/; U.S. Federal Register, Adoption and Procedures of the Section 232 Steel and Aluminum Tariff Inclusions Process (derivative scope; bearing parts added), Aug. 2025, https://www.federalregister.gov/documents/2025/08/19/2025-15819/; MSI, Iron Pipe Fittings Now Tariffed Under Section 232 Expansion (HTS 7307; Section 232 + 301 stacking near 75%), 2025, https://www.msi-products.com/pipe-fittings-now-tariffed-under-section-232-expansion-what-distributors-need-to-know/; White & Case, United States Finalizes Section 301 Tariff Increases on Imports from China (50% copper tariff effective Aug. 2025; 15–35% plumbing-goods price increases), 2024–2025, https://www.whitecase.com/insight-alert/united-states-finalizes-section-301-tariff-increases-imports-china; The White House, Further Adjusting the Tariff Regimes for Imports of Aluminum, Steel, and Copper into the United States, June 2026, https://www.whitehouse.gov/presidential-actions/2026/06/further-adjusting-the-tariff-regimes-for-imports-of-aluminum-steel-and-copper-into-the-united-states/ — cited via child primers [2][3].
6. Flow-control and motion-control segment disclosures — Emerson Electric, Form 10-K FY2025 (Final Control sales $4,380M; segment earnings $1,081M), https://www.sec.gov/Archives/edgar/data/32604/000003260425000087/emr-20250930.htm; Flowserve, Form 10-K FY2025 (Flow Control Division $1,505M, 29.6% gross / 11.9% operating margin; 2025 bookings energy 32% / chemical 27% / general industries 25% / power 16%), https://www.sec.gov/Archives/edgar/data/30625/000003062526000003/fls-20251231.htm; Crane Company, Form 10-K FY2025 (process valves $947.6M; Process Flow Technologies $1,256M at 21.0%), https://www.sec.gov/Archives/edgar/data/1944013/000194401326000095/cr-20251231.htm; Mueller Water Products, Form 10-K FY2025 (Water Flow Solutions $824.9M at 35.9% gross margin; total $1,430M), https://www.sec.gov/Archives/edgar/data/1350593/000135059325000066/mwa-20250930.htm; Parker-Hannifin, Fiscal 2025 Full Year Results ($19.9B; 23.0% segment operating margin), https://investors.parker.com/news-events/press-releases/detail/487/parker-reports-fiscal-2025-fourth-quarter-and-full-year; Gates Industrial, Form 10-K (Fluid Power $1.296B at 22.4% adjusted EBITDA; aftermarket $932M vs. OEM $364M), https://www.sec.gov/Archives/edgar/data/1718512/000162828026007719/gtes-20251231.htm; Helios Technologies, Full Year 2025 Results (Hydraulics $540.8M; 32.3% gross / 16.9% operating margin), https://www.sec.gov/Archives/edgar/data/1024795/000119312526085812/hlio-ex99_1.htm — cited via child primer [2].
7. Plumbing and building-products disclosures — Masco Corporation, Form 10-K FY2025 (Plumbing Products $4.992B at 17.9% operating margin), https://www.sec.gov/Archives/edgar/data/62996/000006299626000005/mas-20251231.htm; Fortune Brands Innovations, Form 10-K FY2025 (Water Innovations $2.4476B at 22.2%; Home Depot and Lowe's 11% each of total sales, top ten 52%, 21% of Water-segment sales), https://www.sec.gov/Archives/edgar/data/1519751/000119312526063960/fbin-20251227.htm; Zurn Elkay Water Solutions, Form 10-K FY2025 ($1.6959B at 16.4% operating margin; materials ~30% of net sales), https://www.sec.gov/Archives/edgar/data/1439288/000162828026006372/zws-20251231.htm; Forbes / IBISWorld, Kohler Co. profile (private, ~$7B), https://www.forbes.com/companies/kohler/ — cited via child primers [2][3].
8. Mueller Industries, Form 10-K FY2025 (Piping Systems $2.71B including $41M insurance and $15M asset-disposal gains; FIFO effects; plastics as principal substitute), https://www.sec.gov/Archives/edgar/data/89439/000008943926000008/mli-20251227.htm; Watts Water Technologies, Form 10-K FY2025 ($2.44B; 49.5% gross / 18.4% operating margin; 66% wholesale channel), https://www.sec.gov/Archives/edgar/data/795403/000110465926018541/wts-20251231x10k.htm — cited via child primers [2][3].
9. Core & Main, Inc., Form 10-K for fiscal year ended Feb. 1, 2026 (net sales $7.65B; pipes, valves and fittings $5.14B ≈ 67%; 26.9% gross margin), 2026 — cited via child primer [2]. https://www.sec.gov/Archives/edgar/data/1856525/000185652526000031/cnm-20260201.htm
10. Bearings pure-plays — The Timken Company, 2025 Form 10-K (~$4.6B global sales; Engineered Bearings $3.018B at 18.9% adjusted EBITDA margin), https://www.sec.gov/Archives/edgar/data/98362/000009836226000012/tkr-20251231.htm; RBC Bearings Incorporated, Fiscal 2026 Form 10-K (net sales $1.871B; 44.4% gross / 22.5% operating margin), https://www.sec.gov/Archives/edgar/data/1324948/000121390026057626/ea0288814-10k_rbcbear.htm — cited via child primer [3].
11. Firearms pure-plays — Sturm, Ruger & Co., Fourth Quarter and Full-Year 2025 Results (net sales $546.1M; $0.27 diluted loss per share), https://www.sec.gov/Archives/edgar/data/95029/000117494725001336/ex99-1.htm; Sturm, Ruger & Co., Form 10-K 2024 (operating margin 17.3% → 9.6% → 5.9% across 2022–2024), https://www.sec.gov/Archives/edgar/data/95029/000117494725000197/rgr-20241231.htm; Smith & Wesson Brands, Full Fiscal 2025 Results (net sales $474.7M, down 11.4%; net income $13.4M; 26.8% gross margin), https://ir.smith-wesson.com/news-releases/news-release-details/smith-wesson-brands-inc-reports-fourth-quarter-and-full-fiscal-1 — cited via child primer [3].
12. Olin Corporation, Form 10-K FY2025 (Winchester $1,725M of $6,781M consolidated sales; segment income $67.7M; segment margin 16.9% → 14.1% → 3.9%; $1.331B contractual backlog at Jan. 31, 2026; Lake City operations), 2026 — cited via child primer [3]. https://www.sec.gov/Archives/edgar/data/74303/000007430326000027/oln-20251231.htm
13. Foreign-listed weapons access — Vista Outdoor / SEC, Form 425 — CSG acquisition of The Kinetic Group ($2.225B final transaction value; announced ~$2.15B; closed Nov. 2024), https://www.sec.gov/Archives/edgar/data/1616318/000095015724001486/form425.htm; Euronext, Czechoslovak Group Announces Admission to Trading on Euronext Amsterdam, Jan. 2026, https://live.euronext.com/en/products/equities/company-news/2026-01-23-czechoslovak-group-announces-admission-trading-euronext; Colt CZ Group, 2025 Annual Report (403,000 firearms sold, +8.4%), https://www.coltczgroup.com/file/1917 — cited via child primer [3].
14. Conventional-ammunition industrial base — General Dynamics, Form 10-K FY2025 (Combat Systems revenue and 14.4% operating margin; Ordnance and Tactical Systems), https://www.sec.gov/Archives/edgar/data/40533/000004053326000006/gd-20251231.htm; Congressional Research Service, Defense Primer: Conventional Ammunition Production Industrial Base (IF12251), https://www.everycrsreport.com/reports/IF12251.html; U.S. Army, Army launches 15-year modernization plan (Organic Industrial Base, $18.1B), https://www.army.mil/article/271806/army_launches_15_year_modernization_plan — cited via child primer [3].
15. Munitions ramp and energetics — CBS News, Defense watchdog finds new 155 mm artillery plant failed to produce parts in 2 years since it was built ($469 million), 2026, https://www.cbsnews.com/news/defense-watchdog-155mm-artillery-plant-production-goals/; Stars and Stripes, Bang for Army's billions of bucks not measuring up in 155 mm shell production, IG says (~36,000 rounds/month in early 2026 against a 100,000 goal), 2026, https://www.stripes.com/branches/army/2026-07-14/army-artillery-shell-shortfall-22262070.html; U.S. Army, U.S. Army Awards Contract for Domestic TNT Production ($435M ceiling; Repkon), https://www.army.mil/article/281247/u_s_army_awards_contract_for_domestic_tnt_production — cited via child primer [3].
16. Pipe fabrication — Perma-Pipe International Holdings, FY2025 Form 10-K (~$211M revenue; 33% gross margin; ~72% international), https://www.sec.gov/Archives/edgar/data/914122/000143774926012499/ppih20260131_10k.htm; Modern Distribution Management, DNOW Completes $1.5B Acquisition of MRC Global (~$5.4B combined PVF revenue), https://www.mdm.com/news/top-distributor-sectors/industrial-pvf/dnow-completes-1-5b-acquisition-of-mrc-upon-mixed-q3/; Turner Industries, Pipe Fabrication Capabilities (450,000+ sq ft; 10,000+ spools per month), https://www.turner-industries.com/services/pipe-fabrication-and-bending/ — cited via child primer [3].
17. Sector M&A, valves — Valve Magazine, CIRCOR Enters Acquisition Deal with KKR, https://valvemagazine.com/news/circor-international-enters-acquisition-deal-with-kkr/; Flowserve, Completes Acquisition of MOGAS Industries, https://ir.flowserve.com/news-events/news-details/2024/Flowserve-Completes-Acquisition-of-MOGAS-Industries/default.aspx; Flowserve, Terminates Merger with Chart Industries ($266M break fee), https://ir.flowserve.com/news-events/news-details/2025/Flowserve-Corporation-Terminates-Merger-with-Chart-Industries/default.aspx; World Oil, Flowserve Completes $490 Million Acquisition of Trillium Valves Business, https://worldoil.com/news/2026/7/1/flowserve-completes-490-million-acquisition-of-trillium-valves-business/; Baker Hughes, To Acquire Continental Disc Corporation ($540M), https://investors.bakerhughes.com/news/press-releases/news-details/2025/Baker-Hughes-to-Acquire-Continental-Disc-Corporation-a-Differentiated-Leader-in-Pressure-Management-Solutions-06-16-2025/default.aspx; Orrick, Crane Company Acquires Baum Lined Piping ($93.5M), https://www.orrick.com/en/News/2023/10/Crane-Company-Acquires-Baum-Lined-Piping-GmbH; ValvTechnologies / Valmet, Acquisition completed July 1, 2026, https://www.valv.com/about/; Danfoss, Eaton Hydraulics Acquisition Finalized ($3.3B), https://www.danfoss.com/en/about-danfoss/news/cf/eaton-hydraulics-acquisition-finalized/; Security Systems News, ASSA ABLOY to acquire HHI division of Spectrum Brands ($4.3B), https://www.securitysystemsnews.com/article/assa-abloy-to-acquire-hhi-division-of-spectrum-brands-includes-kwikset; Plumbing & Mechanical, Behind the NIBCO–Matco-Norca acquisition, https://www.pmmag.com/articles/104921-pm-profile-behind-the-nibco-matco-norca-acquisition; Supply House Times, Apollo Valves (Conbraco) sold to Aalberts, https://www.supplyht.com/articles/94816-apollo-valves-sold-to-aalberts — cited via child primer [2].
18. Sector M&A, all-other — RBC Bearings, Completes Acquisition of ABB's DODGE Mechanical Power Transmission Business ($2.9B), https://investor.rbcbearings.com/news-releases/news-release-details/rbc-bearings-incorporated-completes-acquisition-abbs-dodge; Kaman Corporation / Nasdaq, Arcline Completes Acquisition of Kaman ($1.8B), https://www.nasdaq.com/press-release/arcline-completes-acquisition-of-kaman-2024-04-19; Compass Diversified, Announces Sale of Liberty Safe (~$147.5M enterprise value), https://ir.compassdiversified.com/node/9801/html — cited via child primer [3].
19. U.S. Environmental Protection Agency, water infrastructure and domestic preference — Water Infrastructure Investments (IIJA provides more than $50B through EPA), https://www.epa.gov/infrastructure/water-infrastructure-investments; Fact Sheet: EPA Bipartisan Infrastructure Law ($11.7B DWSRF, $11.7B CWSRF, $15B lead-service-line replacement), https://www.epa.gov/infrastructure/fact-sheet-epa-bipartisan-infrastructure-law; EPA's 7th Drinking Water Infrastructure Needs Survey and Assessment ($625B over twenty years), https://www.epa.gov/dwsrf/epas-7th-drinking-water-infrastructure-needs-survey-and-assessment; Build America, Buy America (BABA) Overview, https://www.epa.gov/baba/build-america-buy-america-baba-overview — cited via child primers [2][3].
20. Firearms demand and weapons taxation — National Shooting Sports Foundation, NSSF-Adjusted NICS Background Checks — 2024 (15.2M) and 2025 (14.6M), https://www.nssf.org/articles/nssf-adjusted-background-checks-top-15-2-million-in-2024/; Bureau of Alcohol, Tobacco, Firearms and Explosives, Firearms Commerce in the United States 2024 (9,772,259 firearms entering commerce in 2023; 13.4M in 2022), https://www.atf.gov/media/22706/download; National Shooting Sports Foundation, Now That the Dust Has Settled on The One, Big, Beautiful Bill… (NFA transfer tax cut from $200 to $0 effective Jan. 1, 2026; registration retained), https://www.nssf.org/articles/now-that-the-dust-has-settled-on-the-one-big-beautiful-bill/; Congressional Research Service, Guns, Excise Taxes, Wildlife Restoration, and the National Firearms Act (R45123) (10% on pistols/revolvers, 11% on other firearms and ammunition), https://www.congress.gov/crs-product/R45123 — cited via child primer [3].
21. American Bearing Manufacturers Association / Mechanical Power Transmission Association, Public submission to the Bureau of Industry and Security (over $2 billion of annual bearing-component imports; ~2-year supplier qualification; counterfeit bearings), 2025 — cited via child primer [3]. https://downloads.regulations.gov/BIS-2025-0023-0167/attachment_1.pdf
22. U.S. Bureau of Labor Statistics, Occupational Outlook Handbook — Machinists and Tool and Die Makers (34,200 annual openings 2024–2034; 2% employment decline; $56,150 median pay, May 2024), https://www.bls.gov/ooh/production/machinists-and-tool-and-die-makers.htm; Welders, Cutters, Solderers, and Brazers (2% employment growth 2024–2034; ~45,600 annual openings), https://www.bls.gov/ooh/production/welders-cutters-solderers-and-brazers.htm — cited via child primers [2][3].
23. U.S. Census Bureau, 2002 Economic Census — Manufacturing Subject Series: Concentration Ratios (NAICS 332919: 238 companies; CR4 19.8%, CR8 34.5%; HHI 217.4), 2002 — cited via child primer [2]. https://www2.census.gov/library/publications/economic-census/2002/manufacturing-reports/subject-series/ec0231sr1.pdf