NAICS 2022 subsector USA Verified: Census NAICS 2022 · 2026-01-01
331
NAICS 331 — Primary Metal Manufacturing
Primary Metal Manufacturing
NAICS 331 is the subsector code for primary metal manufacturing establishments in the United States. It forms part of the hierarchical North American Industry Classification System maintained by the Census Bureau.
Child industry codes in 331 (5)
Exclusions & Cross-References
Activities classified under other official NAICS codes:
- manufacturing metal forgings or stampings (See 332 Fabricated metal product manufacturing)
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/ |
NAICS hierarchy path
Trace the classification from the broadest sector down to this national industry code.