NAICS 21231 is a North American Industry Classification System code. Federal buyers use NAICS for market research, set-aside size standards, and reporting. Official titles come from the Census Bureau NAICS structure.
- Official title
- Stone Mining and QuarryingT
- Code level
- 5
- Parent industry
- 2123 — Nonmetallic Mineral Mining and QuarryingT
- Open opportunities
- 0 open · 0 active