SBA size standard
1,500 employees
Measured by average number of employees over the last 24 months
SBA table effective March 2023
Official 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.
FY2025 federal spending
The Department of Defense bought 72% of the $397.5M obligated under 336120 in FY2025.
- Contract awards
- 885
- Contract vehicles (IDVs)
- 43
Top buying agencies
- Department of Defense$287.6M
- General Services Administration$77.5M
- Department of Agriculture$15.5M
- Department of State$6.1M
- Department of the Interior$3.3M
FY2025 federal contract obligations, USAspending.gov
NAICS 336120 obligated $398 million in FY2025 across 885 contract awards. DoD is $288 million, GSA $78 million, USDA $16 million for Forest Service fire apparatus and heavy fleet, State $6 million, Interior $3 million. The DoD and GSA halves buy different products: militarized tactical trucks against detailed specifications, versus commercial heavy trucks ordered through fleet standards.
What belongs here
Heavy duty truck chassis manufacturing and assembly of complete heavy duty trucks, buses, heavy duty motor homes, and other special purpose heavy duty highway vehicles, or heavy duty chassis alone.
- Light duty vehicles and their chassis are 336110.
- Bodies built onto purchased chassis are 336211.
- Trailers and semitrailers are 336212.
Competing in this code
The code had 43 IDVs alongside 885 awards in FY2025, at an average of $450,000. Specialty applications are where a smaller manufacturer wins: fire apparatus, refuse and utility bodies on heavy chassis, and mission-configured trucks that mainstream production lines will not accommodate at federal quantities. The 1,500-employee size standard is generous enough that essentially any specialty truck builder qualifies as small.
NAICS 336120 FAQ
What is the SBA size standard for NAICS 336120?
SBA sets it at 1,500 employees, counted as a 24-month average headcount across your company and every affiliate, not revenue. At or under that number you are small on NAICS 336120 solicitations and eligible for the set-asides in this code.
Which agencies buy heavy duty trucks under NAICS 336120?
FY2025 obligations: DoD ($288 million), GSA ($78 million), USDA ($16 million), State ($6 million), Interior ($3 million). DoD buys militarized tactical trucks to specification while GSA and USDA buy commercial heavy vehicles to fleet standards, and the two requirements share almost nothing.
Where does a specialty truck builder fit in NAICS 336120?
In applications mainstream production lines will not accommodate at federal quantities: fire apparatus, refuse and utility configurations on heavy chassis, and mission-specific builds. The 1,500-employee standard keeps almost any specialty builder small.
What is the boundary between NAICS 336120 and 336211?
Whether you supply the chassis. 336120 covers manufacturing heavy duty chassis and assembling complete heavy trucks. 336211 covers building bodies and cabs, which may be mounted on chassis purchased from someone else. Upfitters belong in 336211 even when the finished product is a complete truck.