NAICS 2022 nationalIndustry USA Verified: Census NAICS 2022 · 2026-01-01

NAICS 336120 — Heavy Duty Truck Manufacturing

Heavy Duty Truck Manufacturing

NAICS 336120 is the national industry code for heavy duty truck manufacturing establishments in the United States. The Small Business Administration sets a size standard of 1,500 for this classification. It forms part of the hierarchical North American Industry Classification System maintained by the Census Bureau.

SBA: 1,500 View full SBA standard

Exclusions & Cross-References

Activities classified under other official NAICS codes:

manufacturing heavy-duty vehicles on purchased chassis (See 33621 Motor vehicle body and trailer manufacturing)
manufacturing military armoured vehicles (See 336990 Other transportation equipment manufacturing (CAN))
manufacturing off-road trucks (See 333120 Construction machinery manufacturing)
manufacturing road graders (See 333120 Construction machinery manufacturing)
manufacturing trackless trolley buses (electric power from overhead or underground wires) (See 336510 Railroad rolling stock manufacturing)

Official Illustrative Examples

Primary activities officially recognized by Census Bureau / Statistics Canada:

buses, passenger (except trackless trolley), assembling on chassis of own manufacture cab and chassis assemblies, heavy-duty trucks, manufacturing chassis, heavy truck, with or without cabs, manufacturing fire-fighting trucks (e.g., ladder, pumper), assembling on chassis of own manufacture garbage trucks, assembling on chassis of own manufacture heavy trucks, assembling on chassis of own manufacture highway maintenance motor vehicles (e.g., road oilers, sanders), assembling on chassis of own manufacture highway tractors (i.e., for semi-trailers), assembling on chassis of own manufacture street-cleaning motor vehicles (e.g., street flushers, sprinklers, sweepers), assembling on chassis of own manufacture truck tractors for highway use, assembling on chassis of own manufacture

Complete Index of Activities (17 recognized activities) ▼

armoured cars, non-military, assembling on heavy duty chassis of own manufacture

assembly plants, heavy trucks and buses, on chassis of own manufacture

buses, passenger (except trackless trolley), assembling on chassis of own manufacture

cab and chassis assemblies, heavy-duty trucks, manufacturing

chassis, heavy truck, with or without cabs, manufacturing

fire-fighting trucks (e.g., ladder, pumper), assembling on chassis of own manufacture

garbage trucks, assembling on chassis of own manufacture

heavy trucks, assembling on chassis of own manufacture

heavy-duty truck manufacturing

highway maintenance motor vehicles (e.g., road oilers, sanders), assembling on chassis of own manufacture

highway tractors (i.e., for semi-trailers), assembling on chassis of own manufacture

motor homes, self-contained, mounted on heavy truck chassis of own manufacture

snow blowers and ploughs, special purpose motor vehicle (except graders), assembling on chassis of own manufacture

street-cleaning motor vehicles (e.g., street flushers, sprinklers, sweepers), assembling on chassis of own manufacture

tractors, truck, for highway use, assembled on chassis of own manufacture

truck tractors for highway use, assembling on chassis of own manufacture

trucks, heavy (except off-highway), assembling on chassis of own manufacture

Official data

Feature	Description
Official name	North American Industry Classification System (NAICS) 2022
Issuing authority	U.S. Census Bureau with OMB, Statistics Canada, and INEGI
Tax authority	Internal Revenue Service (IRS)
Purpose	Statistical business classification and federal contracting (SAM.gov, SBA standards)
Used in	SAM.gov registration, SBA size determinations, IRS tax classification, SEC EDGAR (via SIC crosswalk)
Active since	2022 (current edition)
Hierarchy level	Sector (2-digit)
Source	https://www.census.gov/naics/