NAICS Code 336120: Heavy Duty Truck Manufacturing
National industry
SBA small business size standard: 1,500 employees
Definition
This industry comprises establishments primarily engaged in (1) manufacturing heavy duty truck chassis and assembling complete heavy duty trucks, buses, heavy duty motor homes, and other special purpose heavy duty motor vehicles for highway use or (2) manufacturing heavy duty truck chassis only.
Government contracts for this product: PSC 2320 Trucks and Truck Tractors, Wheeled
Code facts
- Part of
-
-
31-33
-
336
-
3361
- 33612
-
3361
-
336
-
31-33
- Contract awards
- 1,057 In the last 12 months
- Contract obligations
- $608,999,238 In FY2025
NAICS codes and definitions come from the U.S. Census Bureau, size standards from the SBA and contract spending from SAM.gov/FPDS.
Business activities under NAICS 336120
- Assembly plants, heavy trucks, and buses on chassis of own manufacture
- Buses (except trackless trolley) assembling on chassis of own manufacture
- Chassis, heavy truck, with or without cabs, manufacturing
- Garbage trucks assembling on chassis of own manufacture
- Heavy trucks assembling on chassis of own manufacture
- Highway tractors assembled on chassis of own manufacture
- Motor homes, self-contained, mounted on heavy truck chassis of own manufacture
- Special purpose highway vehicles (e.g., firefighting vehicles) assembling on heavy 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, assembling on chassis of own manufacture
Looking for another activity? Search the NAICS code lookup or browse business activities from A to Z.
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $1,549,760 |
| FY2026 | $467,396,518 |
| FY2025 | $608,999,238 |
| FY2024 | $255,198,727 |
| FY2023 | $365,609,084 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Mack Defense LLC | $154,522,520 | |
| 2 | Oshkosh Defense LLC | $114,852,525 | |
| 3 | Houston Freightliner, Inc. | $40,928,404 | |
| 4 | Central Kenworth LLC | $33,079,111 | |
| 5 | Fleetside Ford, Llc. | $31,949,369 | |
| 6 | Pierce Manufacturing Inc. | $18,256,871 | |
| 7 | International Motors, LLC | $16,440,622 | |
| 8 | Ravelin Defense, Inc. | $15,904,556 | |
| 9 | American Material Handling, Inc. | $12,056,500 | |
| 10 | Fontaine Commercial Trailer, Inc. | $8,203,574 |
See the full FY2025 ranking of NAICS 336120 contractors, by parent company.
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | General Services Administration | $157,410,212 | |
| 2 | Department of the Army | $149,254,815 | |
| 3 | Department of the Navy | $114,915,951 | |
| 4 | Department of the Interior | $18,768,966 | |
| 5 | Air Force | $15,625,475 | |
| 6 | National Aeronautics and Space Administration | $4,976,892 | |
| 7 | Department of Veterans Affairs | $3,791,734 | |
| 8 | Department of Justice | $2,988,462 | |
| 9 | Department of Homeland Security | $1,398,414 | |
| 10 | Department of Health and Human Services | $1,038,108 |
Top PSC codes by obligations
| Rank | PSC code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | 2320 Trucks and Truck Tractors, Wheeled | $321,266,474 | |
| 2 | 2355 Combat, Assault, and Tactical Vehicles, Wheeled | $113,474,739 | |
| 3 | 4210 Fire Fighting Equipment | $27,030,043 | |
| 4 | W023 Lease or Rental of Equipment: Ground Effect Vehicles, Motor Vehicles, Trailers, and Cycles | $3,396,220 | |
| 5 | K023 Modification of Equipment: Ground Effect Vehicles, Motor Vehicles, Trailers, and Cycles | $2,206,451 | |
| 6 | 2540 Vehicular Furniture and Accessories | $1,321,598 | |
| 7 | 2310 Passenger Motor Vehicles | $811,189 | |
| 8 | W063 Lease or Rental of Equipment: Alarm, Signal, and Security Detection Systems | $608,088 | |
| 9 | 4630 Sewage Treatment Equipment | $395,514 | |
| 10 | W065 Lease or Rental of Equipment: Medical, Dental, and Veterinary Equipment and Supplies | $346,009 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Pennsylvania | $154,647,216 | |
| 2 | Wisconsin | $133,103,768 | |
| 3 | Texas | $44,219,558 | |
| 4 | Maryland | $37,181,259 | |
| 5 | Iowa | $31,949,369 | |
| 6 | Tennessee | $16,487,110 | |
| 7 | Arizona | $15,904,556 | |
| 8 | Georgia | $12,285,730 | |
| 9 | Alabama | $8,483,782 | |
| 10 | District of Columbia | $3,830,898 | |
| 11 | Mississippi | $3,384,014 | |
| 12 | Virginia | $3,070,742 | |
| 13 | Ohio | $1,160,562 | |
| 14 | Utah | $546,907 | |
| 15 | Minnesota | $481,855 | |
| 16 | Maine | $232,409 | |
| 17 | South Carolina | $215,450 | |
| 18 | New Jersey | $171,413 | |
| 19 | Colorado | $170,335 | |
| 20 | Montana | $68,104 | |
| 21 | Alaska | $24,997 | |
| 22 | Florida | $24,402 | |
| 23 | Illinois | $22,700 | |
| 24 | Missouri | $20,470 | |
| 25 | Oklahoma | $9,614 |
Show all 25
Shares are of everything obligated under NAICS 336120 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
Show 40 more
Latest 50 of 1,781 listed here. See the rest on GovTribe.
Size standard history
Federal Register rules that named this code
From the NAICS codes each rule's amendments to 13 CFR 121.201 name. Rules that print their size standard tables as images aren't listed.
Quick answers
What is NAICS 336120?
NAICS 336120 is Heavy Duty Truck Manufacturing, a national industry in NAICS 31-33, Manufacturing.
What is the NAICS code for heavy trucks assembling on chassis of own manufacture?
The NAICS code for heavy trucks assembling on chassis of own manufacture is 336120, Heavy Duty Truck Manufacturing.
What is the NAICS code for garbage trucks assembling on chassis of own manufacture?
The NAICS code for garbage trucks assembling on chassis of own manufacture is 336120, Heavy Duty Truck Manufacturing.
What is the NAICS code for highway tractors assembled on chassis of own manufacture?
The NAICS code for highway tractors assembled on chassis of own manufacture is 336120, Heavy Duty Truck Manufacturing.
When did the size standard for NAICS 336120 last change?
The most recent Federal Register rule on record that names NAICS 336120 in the SBA's size standards is "Small Business Size Standards for Manufacturing" (81 FR 4469), published Jan 26, 2016 and effective Feb 26, 2016.
How much do federal agencies spend under NAICS 336120?
Federal contracts under NAICS 336120 obligated $608,999,238 in fiscal year 2025 and $1,698,753,327 in fiscal years 2023 through 2027.
Who are the largest contractors under NAICS 336120?
The contractors with the most obligated under NAICS 336120 in fiscal years 2026 and 2027 are Mack Defense LLC ($154,522,520); Oshkosh Defense LLC ($114,852,525); and Houston Freightliner, Inc. ($40,928,404).
Which agencies buy the most under NAICS 336120?
The agencies that obligated the most under NAICS 336120 in fiscal years 2026 and 2027 are General Services Administration ($157,410,212), Department of the Army ($149,254,815) and Department of the Navy ($114,915,951).
Which PSC codes are used with NAICS 336120?
The PSC codes with the most obligated under NAICS 336120 in fiscal years 2026 and 2027 are 2320 Trucks and Truck Tractors, Wheeled; 2355 Combat, Assault, and Tactical Vehicles, Wheeled; and 4210 Fire Fighting Equipment.
Where is the work under NAICS 336120 performed?
By place of performance, the states with the most contract obligations under NAICS 336120 over the last 12 months are Pennsylvania ($154,647,216), Wisconsin ($133,103,768) and Texas ($44,219,558).
What is the latest contract opportunity under NAICS 336120?
The latest contract opportunity under NAICS 336120 is Tractor Purchase, solicitation from AFLCMC Wright Patterson AFB, posted November 2, 2026.
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