U.S. Forging and Stamping: An Investor Primer

North American Industry Classification System (NAICS) 2022 code 3321 — an industry group (four-digit level) that contains exactly one child industry: 33211, Forging and Stamping. Because the group has a single child, the two levels are effectively identical. This is a short rollup page: it states the group's own federal figures, summarizes what the child now shows, and points you to the full 33211 primer for detail.

1. Overview

Forging and stamping is the part of U.S. manufacturing that shapes solid metal into strong, repeatable parts — by hammering or pressing heated billet (forging), rolling coil through contoured rolls (roll forming), compacting metal powder and heating it below its melting point (powder metallurgy), or punching sheet at high speed (stamping).[1] Its products sit inside almost everything mechanical: aircraft engines and landing gear, truck wheels and driveline parts, bottle caps and canning lids, gears and bearings, solar frames, warehouse racking and building framing.

The one fact an investor should take away is that this is a fragmented, unconcentrated industry with no clean U.S.-listed pure play. The four largest firms hold only about 12% of receipts and the Herfindahl-Hirschman Index is 62.2.[2] Public-market investors buy diversified manufacturers with forging or stamping inside them; private investors have the more direct routes, because most of the industry is family-owned shops, employee-owned companies, and private-equity platforms.

Read that fragmentation number carefully. It is a level-wide average and it does not describe any individual business inside the group: the federal concentration file publishes no unsuppressed CR4 or HHI for any of the five six-digit industries below, so the group's 62.2 cannot be pushed down.[2] Within specific qualified product markets, concentration can be extreme — a generation ago the Federal Trade Commission found only four viable suppliers for certain large titanium and nickel-superalloy aerospace forgings.[4] Fragmentation here is a fact about shop counts, not about competitive intensity in any given part number.

2. What's inside — and why the group equals its one child

At the four-digit level, NAICS separates the economy into industry groups. Group 3321 has only one member industry, 33211 (Forging and Stamping), so every dollar of sales, every job, and every plant in the group belongs to that single child. There is no aggregation or blending to do — 3321 and 33211 are the same population of companies, and their federal statistics are identical line for line.

The detail lives one level down. Industry 33211 in turn splits into five six-digit children that are genuinely different businesses. Shares below are of the group's 2023 employer totals for jobs and plants:[3]

• Metal crown, closure and other stamping (332119) — the largest by far at 49% of jobs and 56% of plants; closures are defensive but not immune, while industrial stamping is cyclical and has been destocking. A long tail of small shops: 821 of its 1,094 plants have fewer than 50 workers.[3]
• Iron and steel forging (332111) — 18% of jobs, 15% of plants; firm in aerospace, defense and energy, soft in autos, rail and heavy vehicles.
• Custom roll forming (332114) — 16% of jobs, 19% of plants; modestly positive on data centers, warehousing, solar and reshoring, though construction signals are mixed rather than uniformly good.
• Powder metallurgy part manufacturing (332117) — 10% of jobs, 7% of plants; a structural headwind from vehicle electrification.
• Nonferrous forging (332112) — the smallest at 6% of jobs and 3% of plants; aerospace, defense and power driven, with forged truck wheels soft into 2026.

One gradient runs across all five and is worth carrying up to this level: pay tracks qualification, not process. Annual payroll per employee runs from roughly $87,000 in nonferrous forging (scarce, aerospace-approved work) through about $77,000 in iron-and-steel forging and $69,000 in roll forming, down to about $63,000 in stamping and $60,000 in powder metallurgy, against a group average near $68,000.[3] The same ranking reappears in segment margins (Section 5).

For the full breakdown of these five — sizes, ownership, economics and listed proxies — see the 33211 primer. The rest of this page reports the group's own numbers and summarizes the investment picture at a high level.

3. How big it is

Our federal ground-truth extract for NAICS 3321 gives figures identical to its one child, drawn from two sources — 2023 County Business Patterns (CBP) for employment and payroll, and the 2022 Economic Census concentration file for receipts, firm count and concentration.[2][3]

The Herfindahl-Hirschman Index is a standard concentration measure that runs from near zero (perfect competition) to 10,000 (a single-firm monopoly). At 62.2, with 1,671 firms and the top four holding just 12% of receipts, this is one of the more fragmented industries in U.S. manufacturing.[2] That fragmentation is the entire backdrop for the investment case: it is why there is no pure-play stock and why private equity can build platforms by rolling up regional shops.

The rollup is clean within CBP, and only within CBP. The five children's 2023 CBP figures sum exactly to the group — 283 + 53 + 373 + 134 + 1,094 = 1,937 establishments, 17,126 + 6,018 + 15,190 + 8,859 + 45,585 = 92,778 employees, and $1.315bn + $0.521bn + $1.050bn + $0.534bn + $2.879bn = $6.299bn of payroll.[3] Nothing else about this group adds up so tidily.

What the receipts figure does — and does not — tell you. The $33.2 billion is 2022 Economic Census receipts for the group as a whole.[2] The revised children now carry a revenue indicator for four of the five — an improvement on the single group total this page previously had — but they come from three different federal programs on different vintages and definitions: $8.431 billion of preliminary 2022 receipts for iron and steel forging (EPA economic analysis)[5], $3.190 billion for nonferrous forging (Statistics of U.S. Businesses)[6], $2.566 billion for powder metallurgy (Economic Census)[7], and $13.797 billion of preliminary receipts restated in 2022 dollars for stamping and closures (EPA economic analysis)[8]. Custom roll forming has no publishable figure. We do not add these together and do not reconcile them against the $33.2 billion — two are EPA restatements rather than final Economic Census totals, one child is missing, and the universes do not match. Any sum would be a manufactured statistic.

The children's universes differ by source, not just their revenue. Where a second federal source exists it consistently describes a different — usually larger — industry than CBP does. In iron and steel forging, CBP counts 283 establishments and 17,126 employees for 2023 while an EPA analysis on 2022 data reports 324 firms operating 376 establishments with 19,681 employees; the sources do not reconcile the gap, and it should not be read as a one-year collapse in capacity.[3][5] In nonferrous forging, CBP shows 53 establishments and 6,018 employees for 2023 against Statistics of U.S. Businesses' 50 firms, 60 establishments and 6,753 employees for 2022.[3][6] Six-digit federal counts in this group are indicative, not definitive, and any market-share calculation built on one of them is fragile. Even "small" is defined differently by child: the Small Business Administration's employee ceiling runs from 950 in nonferrous forging and 750 in iron and steel forging down to 600 in roll forming, 550 in powder metallurgy and 500 in stamping.[9]

Undercount caveat. These are employer-establishment figures. They exclude nonemployer (owner-only) businesses and — more importantly — captive forging and stamping done inside plants classified by their finished product. A vehicle, aircraft, machinery or building maker that forges or stamps in-house is counted in that product's industry, not here.[1] That captive omission understates the true economic footprint of the process. Small and owner-only ownership is most common in stamping, where 821 of 1,094 plants have fewer than 50 workers and an EPA analysis puts roughly 95.6% of employer firms below the applicable SBA threshold by count, and in the roll-forming tail — so the nonemployer omission bites hardest there and least in the capital-heavy forging children.[3][8] No suppressed value is reported above.

4. Investable universe — where value concentrates

Value in this industry does not sit in a listed pure play; it sits in qualified, well-utilized capacity, and most of that capacity is privately held. Public exposure concentrates in two of the five six-digit children. Nonferrous forging (332112) holds by far the largest listed market values, because that is where aerospace and specialty-materials scale lives — Howmet Aerospace posted 2025 sales of $8.25 billion, ATI $4.59 billion, and Precision Castparts $10.8 billion of 2025 revenue inside Berkshire Hathaway — all of it diluted inside much bigger companies, and none of it NAICS revenue.[10][11][13] Stamping and closures (332119) offers the most listed names, packaging and contract-manufacturing groups that each bury stamping in a broader business. Iron-and-steel forging is a cluster of small-caps plus indirect mega-cap ownership; roll forming and powder metallurgy are the thinnest, reachable mainly through a foreign-listed parent or a U.S. driveline group that only closed its powder-metallurgy acquisition in February 2026.[15]

The scale gap between "exposure" and "specialist" is the point: the closest listed pure specialist in the group, SIFCO Industries, had $84.8 million of fiscal-2025 sales — under a hundredth of Howmet's revenue and not purely nonferrous.[10][12] Because no ticker maps to the industry, the specific listed proxies and the larger, more direct private universe — family and employee-owned forgers, independent roll formers, powder-metal and stamping platforms — are laid out child by child in the 33211 primer, Section 4. None is a pure play.

5. How the money works

The whole group runs one financial engine:

• Metal is a pass-through, not a margin. Contracts separate a conversion price from the metal cost, with escalators tied to a steel, aluminum, titanium, nickel or powder index. Lags and gaps in that pass-through are where cash and profit leak — a live risk in 2026, with the Producer Price Index for steel-mill products 16.9% higher than a year earlier in June 2026.[21]
• Capacity utilization is the master lever. Presses, furnaces, mills and skilled crews are fixed costs whether busy or idle, so incremental volume drops through at high margins and lost volume hurts fast. SIFCO quantifies the drag directly: $992,000 of idle-capacity cost in fiscal 2025 and $1.412 million in fiscal 2024.[12] There is no six-digit federal utilization series; the broader fabricated-metal-products sector ran at 76.9% of capacity in June 2026, below its 78.5% average since 1972, even as sector output ran 2.1% above the prior year.[22]
• Tooling and qualification create the moat. Once a die or part is tooled, tested and approved — especially under aerospace, defense, food-contact or automotive standards — customers are slow to re-source. It is not absolute: customers frequently own the dies and can move them.
• Value-added work is where the money migrates. Heat treatment, machining, nondestructive testing and assembly capture more revenue per part.

How wide the spread is. The revised children now carry enough segment disclosure to put a scale under that engine, which this page previously could not. None of these is a NAICS margin, the definitions are not comparable (EBITDA, EBIT, operating and gross margins all appear), and every segment contains work outside the group — but the ordering is the story. Howmet's Forged Wheels segment earned a 28.5% adjusted EBITDA margin on $1.039 billion of 2025 sales and Engineered Structures 21.2% on $1.148 billion; ATI's High Performance Materials & Components ran 23.6% segment EBITDA on roughly $2.4 billion; GKN Powder Metallurgy earned a 9.1% adjusted operating margin in 2024; Mayville Engineering an 8.6% adjusted EBITDA margin in 2025, down from 11.1%; voestalpine's Metal Forming division a 6.3% EBITDA and 1.5% EBIT margin for the nine months to December 2025; and Park-Ohio's Engineered Products segment just 1.4% operating margin in 2025, down from 3.7%, including an $8.9 million impairment tied primarily to Arkansas forging operations.[10][11][14][16][18][19] Aerospace-qualified nonferrous work earns in the low-to-high twenties; diversified industrial, automotive-facing and general-fabrication work earns low-single to low-double digits. Process does not set the margin; qualification, mix and utilization do — the same ranking as the pay spread in Section 2.[3]

6. Demand drivers

Because the underlying children serve different end markets, the group is diversified and rarely moves in unison — which also means no single indicator captures it:

• Aerospace and defense drive nonferrous and high-end iron-and-steel forging — long qualifications, multiyear programs, domestic-sourcing rules. This is where the growth currently is: ATI reported that 92% of High Performance Materials & Components revenue in 2025 came from aerospace and defense, with aerospace-and-defense sales up 14%, commercial jet engines up 21% and defense up 24%, and notes that specialty-material demand leads aircraft deliveries by roughly six to twelve months.[11]
• Automotive and heavy vehicles drive powder metallurgy and much forging and stamping — high operating leverage but sharp cyclicality. North American metal-powder shipments rose only 0.6% in 2025 to 327,379 metric tons while iron-and-steel powder shipments fell 1.6%.[23][24] Electrification is not uniform in its effect: battery-electric drivetrains remove crankshafts, connecting rods and much conventional transmission content but still need high-torque gears, shafts, wheel-end, suspension and safety-critical parts, and hybrids preserve most of it — a negative mix shift for forging, a sharper structural headwind for powder metallurgy.[20]
• Construction, warehousing, data centers and solar drive custom roll forming and building-facing stamping, on signals that are currently mixed rather than uniformly positive.
• Packaged food, beverage, pharma and personal care drive closures — the most defensive demand in the group, but not immune: Silgan's specialty-closure unit volumes fell approximately 3% in 2025, principally on adverse first-half weather in North American beverage.[17]
• Energy, rail, mining and general industrial cut across all of it.

In mid-2026, aerospace, defense and turbine demand and closures were firm while heavy-truck, automotive and general-industrial volumes were visibly softer: Park-Ohio's forged-and-machined-products revenue declined three years running, from $133.4 million in 2023 to $127.8 million in 2024 to $111.3 million in 2025, and Mayville's 2025 sales fell 6.0% to $546.5 million amid weak demand and customer destocking.[14][18]

7. Regulation

Regulation here is plant-level safety, environmental, food-contact and trade rules — not price or rate regulation, so utility-style rate base, real-estate or mining-cost frameworks do not apply. The Occupational Safety and Health Administration (OSHA) governs forging machines, mechanical power presses, machine guarding and hazardous-energy lockout, and powder plants add combustible-dust risk under a national emphasis program.[26][27] The hazard shows up in the data: 2024 total-recordable injury and illness rates were 5.7 cases per 100 full-time workers in nonferrous forging and 5.8 in custom roll forming — roughly double their benchmarks, though the two children benchmark against different bases.[28] The Environmental Protection Agency (EPA) covers air emissions, effluent and hazardous waste, with a separate hazardous-air-pollutant category for surface coating of metal cans that expressly covers crowns and closures.[29][30] The Food and Drug Administration (FDA) regulates food-contact liners and coatings on closures — a compliance layer unique to that business and a live cost, with Silgan reporting expense to remove intentionally added BPA and flagging PFAS restrictions as a possible source of further reformulation.[17][31] Section 232 metal tariffs both support domestic pricing and raise input costs; under the 2026 framework covered steel articles can face a 50% duty while derivative products face product- and origin-specific rates, so exposure has to be assessed shipment by shipment rather than treated as a flat charge.[32] Build America, Buy America and defense specialty-metal and forging restrictions favor qualified domestic suppliers, and private certification such as Nadcap accreditation functions in aerospace as a practical license to compete.[33][34][35] The recurring theme: compliance is also commercial — a safety, quality or food-contact failure can dwarf a year's profit.

8. Consolidation

The fragmentation (HHI 62.2, CR4 12%) is precisely what makes the group a consolidation hunting ground, and the pattern is carve-outs and regional roll-ups, not industry-wide mergers.[2] The logic is the same everywhere — buy customers, tooling, regional coverage and spare capacity rather than build new. The traps are also shared: revenue that evaporates when customer-owned tooling walks, neglected presses and dies, inherited environmental and pension liabilities, and metal-inflated revenue mistaken for real growth. Deal examples across all five children appear in the 33211 primer.

Two facts complicate the fragmentation story, and both are group-wide. First, within specific qualified product markets the industry can be extremely concentrated — the FTC found only four viable suppliers for certain large titanium and nickel-superalloy aerospace forgings when Precision Castparts sought Wyman-Gordon.[4] Second, the group is fragmented downstream but concentrated upstream: the Metal Powder Industries Federation warns that only two major iron-powder suppliers remain in North America, and the U.S. Geological Survey reported only one active U.S. titanium-sponge producer in 2023, with limited capacity directed to electronics after two facilities were idled, against China holding an estimated 65.8% of potential world sponge capacity.[24][25] A buyer of shop capacity is not buying input security.

9. Risks

Shared across the group: operating leverage (low utilization compresses margins fast — the SIFCO idle-capacity charges and the Park-Ohio, Mayville and voestalpine margin declines in Section 5 are all one mechanism); input volatility and input concentration (metal can move faster than surcharges reset, and the supply base behind iron powder and titanium sponge is thin); customer and program concentration (Mayville's ten largest customers were 62.3% of 2025 sales, with PACCAR at 13.6% and Deere at 10.0%; SIFCO's two largest customers and their subcontractors were 34% of fiscal-2025 sales); backlog that is not a contract (awarded programs may carry no minimum purchase obligation, and SIFCO's $119.2 million of September 2025 backlog is explicitly not predictive of sales); single-asset concentration (Berkshire disclosed that a 2025 fire at Precision Castparts' Jenkintown facility affected more than 700 sole-sourced parts, though production was redistributed without stopping a customer's line); quality failures; scarce equipment and labor (roughly 55,200 U.S. tool-and-die-maker jobs in 2024, projected to fall 11% through 2034); trade policy; and substitution (casting, machining, additive manufacturing, plastics and lightweighting).[12][18][24][25][32][36][37]

The clearest structural risk sits in one child — powder metallurgy, where battery-electric vehicles use fewer conventional sintered drivetrain parts, a headwind that hybrids and soft-magnetic applications only partly offset.[20] Custom roll forming carries the group's highest reported injury rate, at 5.8 cases per 100 full-time-equivalent workers.[28]

10. How to invest and outlook

Public investors should treat the listed names as different exposures, not substitutes for the industry, and value the parent company rather than apply a forging or stamping multiple to consolidated earnings. Because concentration is low and no pure play exists, you cannot index the industry — each ticker is a company-specific thesis. Private investors have the more direct and better-matched routes — family succession, regional add-ons, contract-manufacturing platforms, equipment finance, sale-leasebacks and private credit — precisely because 1,671 firms and an HHI of 62.2 leave abundant independent targets.[2] Diligence is operational and consistent across all five children: utilization by press, furnace or mill; tooling ownership and portability; metal pass-through terms; backlog quality after cancellation rights; customer and program concentration; maintenance backlog; and environmental and pension liabilities.

Reported conditions (mid-2026): aerospace, defense, turbine and data-center demand firm, with ATI's aerospace-and-defense revenue up 14%; automotive, heavy-vehicle and general-industrial demand softer, with Park-Ohio's forged-and-machined revenue down three consecutive years and Mayville's sales down 6.0%; closures defensive but units off about 3% on weather; fabricated-metal capacity utilization at 76.9% against a 78.5% long-run average even as sector output ran 2.1% above the prior year; steel-mill prices up 16.9% year over year.[11][14][17][18][21][22]

The best-positioned capacity is scarce, qualified, well-utilized, and pointed at structural tailwinds — aerospace and defense forging, data-center/solar/reshoring roll forming, and defensive closures. The most exposed is mature, automotive-tied powder metallurgy facing electrification. Tariffs and domestic-content rules help only operators who can secure metal, pass through cost, and keep expensive equipment loaded — and, as the upstream picture in Section 8 shows, securing metal is no longer a given. Pay for qualified earning capacity through the cycle, not headline backlog, peak utilization or metal-inflated revenue. For the full breakdown — specific tickers, private operators, child-by-child economics and diligence checklists — read the 33211 primer, which this single-child group passes through to in full.

Sources

1. U.S. Census Bureau, "2022 NAICS Definitions: 33211 Forging and Stamping and constituent industries," 2022, https://www.census.gov/naics/?details=33211&input=33211&year=2022
2. U.S. Census Bureau, "Selected Sectors: Concentration of Largest Firms for the U.S.: 2022 (EC2200SIZECONCEN)," 2025, https://data.census.gov/table/ECNSIZE2022.EC2200SIZECONCEN
3. U.S. Census Bureau, "2023 County Business Patterns (U.S. file; NAICS 33211 and six-digit children)," 2025, https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23us.zip
4. Federal Trade Commission, "Precision Castparts, Wyman-Gordon Settle FTC Charges," 1999, https://www.ftc.gov/news-events/news/press-releases/1999/11/precision-castparts-wyman-gordon-settle-ftc-charges
5. U.S. Environmental Protection Agency, "Economic Analysis for NAICS 332111," 2024, https://downloads.regulations.gov/EPA-HQ-OPPT-2020-0465-0426/attachment_2.pdf
6. U.S. Census Bureau, "2022 Statistics of U.S. Businesses: Six-Digit NAICS Data File," 2024, https://www2.census.gov/programs-surveys/susb/tables/2022/us_state_6digitnaics_2022.txt
7. U.S. Census Bureau, "Economic Census, Establishment and Firm Size Statistics: NAICS 332117," 2025, https://data.census.gov/table/ECNSIZE2022.EC2200SIZECONCEN?codeset=naics~332117&y=2022
8. U.S. Environmental Protection Agency, "Economic Analysis for NAICS 332119," 2024, https://downloads.regulations.gov/EPA-HQ-OPPT-2020-0642-0728/content.pdf
9. U.S. Small Business Administration, "Table of Small Business Size Standards," 2023, https://www.sba.gov/document/support-table-size-standards
10. Howmet Aerospace, "Annual Report on Form 10-K for 2025," 2026, https://www.sec.gov/Archives/edgar/data/4281/000000428126000012/hwm-20251231.htm
11. ATI, "Annual Report on Form 10-K for 2025," 2026, https://www.sec.gov/Archives/edgar/data/1018963/000162828026010140/ati-20251228.htm
12. SIFCO Industries, "Annual Report on Form 10-K for Fiscal 2025," 2025, https://www.sec.gov/Archives/edgar/data/90168/000162828025058405/sif-20250930.htm
13. Berkshire Hathaway, "Annual Report on Form 10-K for 2025," 2026, https://www.berkshirehathaway.com/2025ar/202510-k.pdf
14. Park-Ohio Holdings, "Annual Report on Form 10-K," 2025, https://www.sec.gov/Archives/edgar/data/76282/000007628226000007/pkoh-20251231.htm
15. Dauch Corporation, "Completion of Acquisition of Dowlais Group plc (GKN Powder Metallurgy)," 2026, https://www.sec.gov/Archives/edgar/data/1062231/000110465926009503/tm264521d2_ex99-2.htm
16. voestalpine AG, "Metal Forming Division Quarterly Report Q3 2025/26," 2026, https://reports.voestalpine.com/2526/qb/3/divisionsberichte/metal-forming-division.html
17. Silgan Holdings, "Annual Report on Form 10-K for 2025," 2026, https://www.sec.gov/Archives/edgar/data/849869/000162828026012202/slgn-20251231.htm
18. Mayville Engineering Company, "Annual Report on Form 10-K for 2025," 2026, https://www.sec.gov/Archives/edgar/data/1766368/000110465926023496/tmb-20251231x10k.htm
19. Dowlais Group, "2024 Full Year Results Presentation," 2025, https://www.dowlais.com/files/investors/Presentations/2025/Dowlais-2024-FY-Results-Presentation-Final.pdf
20. Dauch Corporation (formerly American Axle), "Metal Forming," 2026, https://www.aam.com/what-we-do/our-products/metal-forming
21. U.S. Bureau of Labor Statistics via Federal Reserve Bank of St. Louis, "Producer Price Index: Steel Mill Products (WPU1017)," 2026, https://fred.stlouisfed.org/series/WPU1017
22. Board of Governors of the Federal Reserve System, "Industrial Production and Capacity Utilization (G.17)," 2026, https://www.federalreserve.gov/releases/g17/current/g17.pdf
23. Metal Powder Industries Federation, "State of the PM Industry in North America—2025," 2025, https://www.mpif.org/News/PressReleases/TabId/166/ArtMID/1129/ArticleID/1107/State-of-the-PM-Industry-in-North-America%E2%80%942025.aspx
24. Metal Powder Industries Federation, "State of the PM Industry in North America—2026," 2026, https://www.mpif.org/News/PressReleases/TabId/166/ArtMID/1129/ArticleID/1280/State-of-the-PM-Industry-in-North-America%E2%80%942026.aspx
25. U.S. Geological Survey, "Titanium Mineral Concentrates and Titanium Sponge Metal—2023–2028," 2025, https://pubs.usgs.gov/publication/sir20255021/full
26. Occupational Safety and Health Administration, "1910.218 Forging Machines; 1910.217 Mechanical Power Presses; 1910.212 General Machine Guarding; 1910.147 Control of Hazardous Energy," current regulations, https://www.osha.gov/laws-regs/regulations/standardnumber/1910
27. Occupational Safety and Health Administration, "Combustible Dust: An Explosion Hazard," 2026, https://www.osha.gov/combustible-dust
28. U.S. Bureau of Labor Statistics, "Table 1. Incidence Rates of Nonfatal Occupational Injuries and Illnesses by Industry and Case Types, 2024," 2025, https://www.bls.gov/web/osh/table-1-industry-rates-national.htm
29. U.S. Environmental Protection Agency, "Metal Fabrication and Finishing Source Categories," 2026, https://www.epa.gov/stationary-sources-air-pollution/metal-fabrication-and-finishing-source-categories-national
30. U.S. Environmental Protection Agency, "Surface Coating of Metal Cans: National Emission Standards for Hazardous Air Pollutants," 2026, https://www.epa.gov/stationary-sources-air-pollution/surface-coating-metal-cans-national-emission-standards-hazardous
31. U.S. Food and Drug Administration, "Determining the Regulatory Status of Components of a Food Contact Material," 2026, https://www.fda.gov/food/packaging-food-contact-substances-fcs/determining-regulatory-status-components-food-contact-material
32. White House, "Further Adjusting the Tariff Regimes for Imports of Aluminum, Steel, and Copper," 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/
33. Office of Management and Budget, "Build America, Buy America Implementation Guidance Update," 2023, https://www.whitehouse.gov/wp-content/uploads/2023/10/m-24-02-Buy-America-Implementation-Guidance-Update.pdf
34. U.S. Department of Defense, "DFARS 252.225-7009 / 252.225-7025: Restrictions on Specialty Metals and Forgings," current regulations, https://www.acquisition.gov/dfars/252.225-7025-restriction-acquisition-forgings/
35. Performance Review Institute, "Nadcap Metallic Materials Manufacturing—Forgings," 2026, https://www.p-r-i.org/nadcap/metallic-materials-manufacturing-forgings
36. Berkshire Hathaway, "2025 Annual Letter to Shareholders," 2026, https://www.berkshirehathaway.com/letters/2025ltr.pdf
37. U.S. Bureau of Labor Statistics, "Occupational Outlook Handbook: Machinists and Tool and Die Makers," 2026, https://www.bls.gov/ooh/production/machinists-and-tool-and-die-makers.htm