Rubber and Plastics Hoses and Belting Manufacturing (U.S.)

NAICS 2022 code 326220 — an investor's primer

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1. Overview

Almost every machine that moves fluid or transmits power relies on a flexible rubber or plastic part that most people never see: the hydraulic hose on an excavator, the serpentine belt spinning a car's alternator, the mile-long conveyor belt hauling coal out of a mine, the reinforced hose feeding a chemical plant, and the garden hose in the shed. NAICS (North American Industry Classification System) code 326220 covers the U.S. factories that make these hoses and belting from rubber and plastic.[1]

Why an investor cares: this is a classic "picks-and-shovels" industrial consumables business. The products wear out and must be replaced on a schedule, which gives the best operators a steady, recurring aftermarket (replacement-parts) revenue stream layered on top of cyclical sales to equipment builders. It is a mature, moderately profitable manufacturing niche that rides the broader cycles of vehicles, construction, agriculture, mining and general industrial activity — with newer growth pockets in automation, warehouse systems, and liquid-cooled data centers.[15]

Ways in:

• Public-market investors have essentially one near-pure-play listed name — Gates Industrial — plus exposure buried inside large diversified conglomerates (Parker Hannifin, Michelin, Bridgestone) and, until recently, Continental. There is no exchange-traded fund dedicated to this niche.
• Private-market investors are arguably the more natural owners here. The industry is full of mid-sized specialist manufacturers, and private equity now controls two of the three largest global platforms (see Sections 4 and 8).

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2. What it is and how it's structured

In scope. Establishments primarily making rubber hose and/or reinforced-plastic hose and belting from natural rubber, synthetic rubber and/or plastic resins. It includes firms that make garden hose from purchased hose.[1] Two broad product families dominate:

• Hose — hydraulic and pneumatic hose for machinery, industrial process hose (chemical, food, water, oil-and-gas), automotive hose (coolant, fuel, air-conditioning), and consumer/garden hose. A hydraulic hose typically has an elastomeric inner tube, steel-wire or textile reinforcement, and an abrasion- and weather-resistant outer cover.[15]
• Belting — two very different things sold under one word: power-transmission belts (V-belts, serpentine/multi-ribbed belts, synchronous timing belts that transmit engine and motor power) and conveyor belts (the heavy rubber-and-fabric belting that moves bulk material in mines, quarries, ports and factories). Conveyor belting can use textile carcasses or steel cables depending on duty.[16]

What it excludes (and where those activities are counted instead) — this matters, because the "hose and belt" you picture is often classified elsewhere:

• Rubber tubing → NAICS 326299, All Other Rubber Product Manufacturing.[2]
• Plastic tubing / profile shapes → NAICS 326121, Unlaminated Plastics Profile Shape Manufacturing.[2]
• Molded, extruded or lathe-cut rubber goods for mechanical use (seals, gaskets, mounts) → NAICS 326291, Rubber Product Manufacturing for Mechanical Use.[2]
• Fluid-power hose assemblies — the hose plus crimped metal fittings sold as a finished coupling — → NAICS 332912, Fluid Power Valve and Hose Fitting Manufacturing.[2]
• Rigid plastic pipe → NAICS 326122.[2]

That last two exclusions are the reason federal factory statistics understate the products' real economic footprint: much of the value a customer pays for is the assembly and the fitting, which land in a different metal-products code.

Materials are shifting. The Census notes that plastics increasingly substitute for rubber within the wider plastics-and-rubber-products classification.[17] Suppliers are moving from chloroprene toward ethylene elastomers and using thermoplastic or hybrid reinforcement to reduce weight, improve service life, and meet chemical restrictions.[15]

Ownership mix. A barbell. At the top sit a handful of large, capital-intensive, often foreign-owned or private-equity-owned platforms with global plants. Below them is a long tail of privately held, family- or founder-owned specialist manufacturers serving particular niches (food-grade hose, mining belt, custom industrial hose). Federal data count 187 firms operating 275 establishments (Section 3) — a genuinely fragmented industry beneath the leaders.[3][4]

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3. How big it is

U.S. federal statistics for NAICS 326220:

This is a small, well-defined manufacturing industry — a couple of hundred companies, roughly $7–8 billion of domestic factory output (depending on year and Census measure), roughly 20,000 workers earning solidly above the private-sector average, consistent with skilled machine-operator and technical work.

Concentration. The Economic Census reports the top 4 firms make 42.3% of shipments, the top 8 make 55%, the top 20 make 71.4%, and the top 50 make 90%.[4] The Herfindahl-Hirschman Index (HHI, a standard concentration score where the U.S. Department of Justice treats anything below 1,500 as "unconcentrated") is 600.4.[4] Read together: a few large leaders take a big slice, but the market as a whole is competitive with a long tail of smaller specialists — no single firm dominates.

The undercount / footprint caveat. Unlike industries dominated by government or by tiny individual operators, this one is captured cleanly by the Census — these are real factories with payrolls. The distortion runs the other way. The $7–8 billion figure is domestic factory shipments of hose and belting only. The economic activity around these products is much larger because (a) the big players are global and book most of their revenue outside this one U.S. code and outside the country, and (b) commercial "industrial hose market" estimates — which put North American industrial hose alone around $3.4 billion in 2024 on one analyst's count — include fittings, finished assemblies and distribution that Census assigns to other codes.[5] NAHAD reported a $2.8 billion industrial-hose market at end-user "street" prices for 2024, including estimated distributor margin — a different perimeter and valuation point from the Census's factory-level measure.[19] Treat the Census figures as the honest measure of U.S. manufacturing output, not the size of the products' total market.

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4. The investable universe

There is one near-pure, U.S.-listed way to own this industry directly; everything else is an embedded exposure inside a bigger company, or a privately held platform.

Takeaways for a stock picker: Gates is the only listed name where hose-and-belting is the business (and even it is global — the United States accounted for 38.8% of its 2025 sales by destination — and split between belts and hydraulics).[15] Parker, Michelin and Bridgestone give you hose or belting only as a small fraction of a much larger, differently-driven company. Two of the three biggest global platforms — ContiTech and Eaton's former hydraulics unit — have moved into private hands, which is the clearest signal of where the concentrated ownership sits. Dayco was acquired by Hidden Harbor Capital Partners in 2022, while its OEM-oriented Propulsion Solutions operation was subsequently acquired by AURELIUS.[22][23]

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5. How the money works

This is a manufacturing spread-and-throughput business. Owners make money on the gap between what raw materials and factory time cost and what customers pay for a finished, engineered part. The levers that actually matter:

• The material spread and cost pass-through. The main inputs are natural and synthetic rubber, carbon black, thermoplastic resins, and reinforcement (polyester and aramid fiber, steel wire). Most of these track oil and petrochemical prices, so feedstock costs swing.[10] Gates specifically identifies energy, steel, aluminum, rubber-based materials, chemicals, and polymers as important purchased inputs and notes it generally lacks long-term raw-material pricing contracts.[15] Profitability depends on pricing power — whether a maker can pass higher input costs through to customers, and how fast. When costs fall (as synthetic-rubber feedstocks softened in late 2024), disciplined producers can hold price and expand margins.[10]

• Capacity utilization and operating leverage. These are fixed-cost plants (extruders, curing/vulcanizing lines, calenders). Running them full is highly profitable; running them half-empty is painful. Utilization is the swing factor between a good year and a bad one.

• Replacement vs. original-equipment (OE) mix — the profit engine. Belts and hoses are consumable wear parts. Selling to equipment builders (OE) is lower-margin and swings hard with the industrial cycle. Selling replacement parts through distribution is higher-margin, stickier, and far steadier because it is driven by the installed base wearing out, not by new-equipment demand. Gates illustrates the model: aftermarket channels supplied 68% of its global sales in 2025 versus 32% from OEMs; in North America and EMEA the aftermarket share was approximately 73%.[15] In the soft 2024 market its OE sales fell double digits while replacement sales still grew, and the company posted an adjusted EBITDA margin of 22.3%, up from 20.9% a year earlier, on lower revenue.[6] A replacement-heavy mix is what lets the best operators grow profit in a down cycle.

• Aftermarket brand and specification. In power transmission and hydraulics, a mechanic reaches for a trusted brand and an exact part number. Being the "spec'd-in" brand on original equipment pulls through decades of higher-margin replacement sales — a durable moat the commodity garden-hose end of the industry lacks.

Margin range. Margins vary widely by product mix and channel. Gates reported a 22.4% adjusted EBITDA margin globally for 2025; its Fluid Power segment also earned 22.4%.[15] ContiTech, with a broader and more OEM-exposed portfolio, reported a 5.3% adjusted EBIT margin in 2025, down from 6.1% in 2024, amid lower volume, restructuring, tariffs, and portfolio change.[20] These are company-defined non-GAAP results and include products outside NAICS 326220, but they bracket the economics of a replacement-heavy specialist versus a diversified supplier.

The scoreboard metrics an investor should watch: gross and EBITDA margin, capacity utilization, replacement-vs-OE mix, and core (organic) volume growth stripped of currency and acquisitions.

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6. What drives demand

Demand is derived — it comes from whatever the hose or belt is attached to — and splits into a cyclical half and a resilient half:

• Automotive fleet, age and miles driven (resilient). Replacement belts and hoses track the size and age of the vehicle parc (the total fleet on the road) and how much it is driven, not new-car sales. This is the most stable demand pool; it held up for Gates even as industrial markets fell in 2024.[6]
• Industrial production and maintenance (MRO). Factory activity and the general MRO (maintenance, repair and operations) budget drive process hose and industrial belt replacement.
• Construction and agriculture (cyclical). Excavators, tractors and harvesters are hydraulic-hose-intensive; when equipment builders slow, so does OE hose demand. These were the two weakest markets across 2024.[6]
• Mining and bulk handling (cyclical, belt-heavy). Conveyor belting demand follows mine output, capital spending and commodity cycles.[8]
• Energy, water and infrastructure. Oil-and-gas, water treatment and public-works spending pull specialty and large-diameter hose.[5]
• Automation and warehouse systems. Growing demand for conveying and power-transmission products.[15]
• Liquid-cooled data centers (emerging). Gates added hose, coupling, and pump products for coolant distribution and rack-level cooling during 2025 — an emerging application as AI workloads drive denser thermal loads.[15]
• Consumer/seasonal. Garden and light-duty hose is a lower-value, seasonal, import-exposed segment.

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7. Regulation

The industry is standards- and safety-regulated rather than economically regulated (no price or entry controls). Compliance is a real cost of doing business and, for the leaders, a barrier to entry:

• Mine safety. Conveyor belt used underground in U.S. coal mines must be flame-resistant and approved under MSHA (Mine Safety and Health Administration) rules at 30 CFR Part 14.[11] This gatekeeps who can supply mining belt.
• Fluid-power standards. Hydraulic hose is built and rated to SAE J517 (Society of Automotive Engineers) construction and pressure classes; automotive coolant and other under-hood hoses follow SAE specifications (e.g. SAE J20).[13] These are industry consensus standards that customers require by contract.
• Food, water and health contact. Hose for food, beverage and potable water must meet FDA (Food and Drug Administration) and NSF/3-A material and sanitary requirements.
• Qualification and safety documentation. Failure of a high-pressure hose or mission-critical belt can cause downtime, contamination, injury, or equipment damage. NAHAD's Hose Safety Institute emphasizes documented specification, fabrication, cleanliness, testing, calibration, and incident procedures — the performance of the complete assembly, not hose alone.[24]
• Environmental compliance. Facilities may face Clean Air Act permitting, hazardous-waste requirements, and chemical reporting from polymer compounding, solvents, and curing operations.[25]
• Trade policy. Import competition is shaped by tariffs. Section 301 duties on Chinese goods raised costs on many imported hoses (e.g. garden hose under HTS 3917.39) and rubber products, a meaningful factor for the lower-value, import-exposed segments and for buyers' sourcing decisions.[14] General-purpose ASTM and ISO material and test standards apply throughout.

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8. Competitive dynamics and consolidation

Structure: top-heavy but fragmented — a few global leaders (Gates, ContiTech, Parker, Danfoss) over a long tail of ~180 specialist firms, with an unconcentrated HHI of 600.[4] Trade-press rankings place Continental, Parker-Hannifin, Hutchinson, Gates, and other diversified polymer companies among the largest non-tire rubber-product groups, though those rankings include considerable revenue outside NAICS 326220.[26] Competition is on engineering, brand/aftermarket franchise, breadth of catalog and distribution, and cost.

The consolidation story is a portfolio reshuffle by strategics, with private equity picking up the pieces:

• Continental AG is exiting industrials entirely to become a pure tire company: it agreed in July 2026 to sell ContiTech (its conveyor, fluid and drive-systems business, ~22,000 employees) to an affiliate of Lone Star Funds for €4.0 billion, plus potential performance-based payments of up to €250 million, after earlier selling ContiTech's original-equipment hose-line unit to Regent L.P.[8][20]
• Eaton sold its Hydraulics business (hose, connectors, systems, ~$1.8B sales) to Danfoss for $3.3 billion in 2021, roughly doubling Danfoss Power Solutions.[9]
• Dayco was acquired by Hidden Harbor Capital Partners in 2022; its OEM-oriented Propulsion Solutions business was subsequently acquired by AURELIUS.[22][23]
• Gates Industrial itself is a private-equity creation — built and taken public by Blackstone, which has been steadily selling down its stake through secondary offerings.[12]

The through-line: large diversified owners are treating hose-and-belting as non-core and handing it to financial buyers and specialists who can run these consumables platforms for cash. Expect further bolt-on roll-ups of the fragmented tail.

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9. Risks

• Cyclicality. OE demand from construction, agriculture, mining and general industry swings with the capital-spending cycle; 2024's ag/construction weakness is a live example.[6]
• Input-cost volatility. Oil-linked rubber, carbon black and resin prices move margins if they can't be passed through quickly.[10]
• Import competition and trade policy. Lower-value hose and belt segments face cheap imports; tariff regimes (Section 301) and sourcing shifts cut both ways for domestic makers and buyers.[14]
• Customer/channel concentration. OE relationships can concentrate revenue with a few equipment builders; distribution consolidation pressures pricing.
• Technology and substitution. The EV (electric-vehicle) transition removes some traditional under-hood hoses and belts (no serpentine belt, different cooling) even as it adds new thermal-management hose for battery, inverter, motor, and cabin cooling — a mixed, product-specific effect. Suppliers with engine-belt concentration face a secular headwind; those able to meet coolant cleanliness, electrical-conductivity, weight, and thermal-cycling requirements have a new design-in opportunity. Gates already supplies synchronous belts in electric power steering and thermal-management hose for EVs.[15] Beyond EVs, chains, gears, and rigid metal tube can replace some belt or hose applications, while belts can displace chain drives where weight, noise, or lubrication matter.
• Labor availability. Gates reports limited availability of skilled workers in some locations for compounding, extrusion, curing, quality control, and engineering, along with turnover, wage, and work-stoppage risks.[15]
• Financial-owner leverage. Several leaders now sit under private equity; heavier debt loads raise the stakes on the down-cycle.

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10. How to invest and the outlook

Public routes. The only clean listed exposure is Gates Industrial (GTES) — a global belts-and-hydraulics maker with a replacement-heavy, margin-resilient model; watch its core volume, replacement mix and EBITDA margin.[6][15] Beyond that, Parker Hannifin (PH), Michelin and Bridgestone give hose or belting only as a minor line inside much larger, differently-driven businesses, so you are buying the parent's whole story, not this niche. Cooper-Standard provides automotive fluid-handling exposure but with greater OEM-platform and customer concentration. No dedicated fund exists; broad industrial ETFs give only trace exposure.

Private routes. This is where the industry mostly lives. The action is in private-equity platforms (Lone Star's ContiTech, Danfoss's hydraulics, Hidden Harbor's Dayco, and the many founder-owned specialists in food-grade, mining-belt and custom industrial hose) — accessible through PE funds, direct acquisition of family-owned manufacturers, or as a distributor/fabricator building hose assemblies. The fragmented tail (~180 firms) is fertile ground for buy-and-build roll-ups. Key diligence points: separate manufacturing margin from distribution margin, measure aftermarket versus OEM revenue, identify design-in and single-source positions, examine price-cost lag and warranty history, and test whether reported growth reflects genuine end demand or distributor inventory changes.

Near-term drivers (forward-looking). The base case is a mature, low-single-digit-growth industry whose fortunes turn on: the timing of an industrial and equipment-cycle recovery in construction, agriculture and mining; the durability of the resilient automotive-aftermarket demand pool; the direction of oil-linked raw-material costs and pricing discipline; U.S. reshoring and infrastructure spending (supportive of domestic hose and belt); the EV transition's mixed product-mix effects; and emerging opportunities in data-center cooling and automation. The likeliest path is continued consolidation under financial and specialist owners, with the winners being the replacement-brand franchises that can grow profit even when volumes are flat.

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Sources

1. U.S. Census Bureau, NAICS 2022 Definition — 326220 Rubber and Plastics Hoses and Belting Manufacturing, 2022. https://www.census.gov/naics/?input=326220&year=2022
2. NAICS Association / U.S. Census cross-references, NAICS 326220 illustrative examples and exclusions (326299, 326121, 326291, 332912, 326122), 2022. https://www.naics.com/naics-code-description/?code=326220
3. U.S. Census Bureau, County Business Patterns (CBP), NAICS 326220 — establishments, employment, annual payroll, 2023. https://data.census.gov/
4. U.S. Census Bureau, 2022 Economic Census — Concentration ratios and value of shipments/receipts, NAICS 326220 (CR4, CR8, CR20, CR50, HHI, firm count), 2022. https://data.census.gov/
5. The Insight Partners, North America Industrial Hose Market (market-size estimate and key-player list; note: broader than NAICS 326220), 2024. https://www.theinsightpartners.com/pr/north-america-industrial-hose-market
6. Gates Industrial Corporation plc (PR Newswire), Gates Industrial Reports Fourth-Quarter and Full Year 2024 Results, 2025. https://www.prnewswire.com/news-releases/gates-industrial-reports-fourth-quarter-and-full-year-2024-results-302369673.html
7. Parker Hannifin Corporation, Fact Sheet 2024 / FY2024 Annual Report (total company sales), 2024. https://www.parker.com/content/dam/Parker-com/About-Us/Literature/PH-Fact-Sheet-2024.pdf
8. Modern Distribution Management, Continental to Sell ContiTech to Lone Star Funds for $4.6B, 2025. https://www.mdm.com/top-distributor-sectors/hose-hose-accessories-distribution/continental-to-sell-contitech-to-lone-star-funds-for-4-6b/
9. CrossCo / Construction Equipment, Danfoss Acquires Eaton Hydraulics Business ($3.3 billion, 2021), 2021. https://www.crossco.com/blog/danfoss-acquires-eaton-hydraulics/
10. Procurement Resource, Synthetic Rubber and Natural Rubber Price Trends (feedstock-linked, 2024 softening), 2024–2025. https://www.procurementresource.com/resource-center/synthetic-rubber-price-trends
11. Electronic Code of Federal Regulations (eCFR), 30 CFR Part 14 — Requirements for the Approval of Flame-Resistant Conveyor Belts (MSHA), current. https://www.ecfr.gov/current/title-30/chapter-I/subchapter-B/part-14
12. Investing.com / companiesmarketcap, Blackstone secondary offerings and Gates Industrial (GTES) market capitalization, 2024–2026. https://companiesmarketcap.com/gates-industrial-corp/marketcap/
13. SAE International (via Insane Hydraulics), SAE J517 Hydraulic Hose Standard (and related SAE automotive hose specs), current. https://www.insanehydraulics.com/letstalk/saehosestandard.html
14. White & Case LLP / USTR, United States Finalizes Section 301 Tariff Increases on Imports from China (incl. plastics/rubber hose, HTS 3917.39), 2024. https://www.whitecase.com/insight-alert/united-states-finalizes-section-301-tariff-increases-imports-china
15. Gates Industrial Corporation plc, Form 10-K for fiscal year ended January 4, 2026, 2025. https://www.sec.gov/Archives/edgar/data/1718512/000162828026007719/gtes-20251231.htm
16. Association for Rubber Products Manufacturers (ARPM), Handbooks and Guides — conveyor belt technical descriptions. https://arpminc.com/publications/category/handbooks-and-guides
17. U.S. Census Bureau, Industry Profile: 326 — Plastics and Rubber Products Manufacturing (material substitution trends). https://data.census.gov/profile/326_-_Plastics_and_rubber_products_manufacturing?codeset=naics~326
18. U.S. Census Bureau, Annual Integrated Economic Survey — NAICS 326220 sales/revenue, 2023. https://data.census.gov/table/AIESBASICTIMESERIES.AIES31BASIC01?codeset=naics~32622&g=010XX00US
19. NAHAD, Markets Monitor Q1 2024 (industrial hose end-user market estimate). https://nahad.org/wp-content/uploads/2025/01/NAHAD-Markets-Q12024.pdf
20. Continental AG, 2025 Annual Report — ContiTech sector. https://annualreport.continental.com/2025/en/report/economic-report/development-group-sectors/contitech.php
21. Fenner, About Fenner (Michelin ownership). https://www.fenner.com/company/about-fenner
22. Hidden Harbor Capital Partners, Closes on Acquisition of Dayco LLC, 2022. https://hh-cp.com/hidden-harbor-capital-partners-closes-on-acquisition-of-dayco-llc/
23. AURELIUS Group, AURELIUS Private Equity Acquires Dayco's Propulsion Solutions Business. https://www.aurelius-group.com/aurelius-private-equity-acquires-daycos-propulsion-solutions-business-new
24. NAHAD Hose Safety Institute, HSI Designation (qualification and safety documentation). https://nahad.org/hsi-designation/
25. U.S. EPA, TRI Reporting Guidance for Rubber and Plastics Manufacturing. https://nepis.epa.gov/Exe/ZyPURL.cgi?Dockey=P1001V6L.TXT
26. European Rubber Journal, Global Top 50 Rubber Product Manufacturers 2025. https://www.european-rubber-journal.com/article/2097804/global-top-50-rubber-product-manufacturers-2025