336120 — Heavy Duty Truck Manufacturing
Description
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.
Exclusions & Cross-References
- Manufacturing truck and bus bodies and assembling vehicles on purchased chassis--are classified in U.S.
- Industry 336211, Motor Vehicle Body Manufacturing;
- Manufacturing motor homes on purchased heavy truck chassis--are classified in U.S. Industry 336213,
- Motor Home Manufacturing;
- Manufacturing vans, minivans, and light trucks--are classified in Industry 336110, Automobile and Light
- Duty Motor Vehicle Manufacturing;
- Manufacturing military armored vehicles--are classified in U.S. Industry 336992, Military Armored
- Vehicle, Tank, and Tank Component Manufacturing; and
- Manufacturing off-highway construction equipment--are classified in Industry 333120, Construction
- Machinery Manufacturing.
Overview Facts
| NAICS Code | 336120 |
|---|---|
| Industry Title | Heavy Duty Truck Manufacturing |
| SBA Size Standard | 1,500 employees |
| IRS PBA Code | 336100 (rolled-up match) |
| Sectors Hierarchy | Sector 31-33 → 336 → 3361 |
| Source / Verified | US Census 2022 NAICS Manual / 2026-06-28 |
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 3711 - Motor Vehicles and Passenger Car Bodies (via SIC1987:3711→NAICS1997:33612→2002:336120→2007:336120→2012:336120→2017:336120→2022:336120)
Related Resources & Compliance Guides
Further regulatory reference links for NAICS code 336120:
- Sector 31-33 Directory Hub — List of related industries in the Manufacturing sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.
Related Industries in 3361
Frequently Asked Questions (FAQ)
Is 336120 a valid 2022 NAICS code?
NAICS 336120 is 'Heavy Duty Truck Manufacturing', a 2022 U.S. national industry under Sector 31-33 (Manufacturing); the SBA small-business size standard is 1,500 employees.
What is the SBA size standard for NAICS 336120?
The SBA small business size standard for NAICS 336120 is 1,500 employees (based on employees).
What is the legacy SIC code mapping for 336120?
NAICS code 336120 maps to the legacy 1987 SIC codes: 3711 - Motor Vehicles and Passenger Car Bodies.