327993 — Mineral Wool Manufacturing
Description
This U.S. industry comprises establishments primarily engaged in manufacturing mineral wool and mineral wool (i.e., fiberglass) insulation products made of such siliceous materials as rock, slag, and glass or combinations thereof (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
Exclusions & Cross-References
- Establishments primarily engaged in manufacturing metallic scouring pads and steel wool are classified in U.S.
- Industry 332999, All Other Miscellaneous Fabricated Metal Product Manufacturing.
Overview Facts
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 3296 - Mineral Wool (via SIC1987:3296→NAICS1997:327993→2002:327993→2007:327993→2012:327993→2017:327993→2022:327993)
Suggested Product Service Codes (Advisory)
The following Product Service Codes (PSCs) are advisory suggestions aligned with this NAICS code. Note: NAICS and PSC codes map to different dimensions of procurement (industry vs. product/service). There is no official binding 1:1 crosswalk.
- PSC J096 — Maintenance, Repair and Rebuilding of Equipment: Ores, Minerals, and Their Primary Products
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 327993 valid in 2022? ▾
Yes, 327993 is a valid 6-digit 2022 NAICS national industry code representing 'Mineral Wool Manufacturing' under Sector 31-33 in the official classification index.
What is the SBA size standard for NAICS code 327993? ▾
The Small Business Administration (SBA) has established a small business size standard of 1,500 employees for NAICS code 327993 (Mineral Wool Manufacturing), calculated based on employees.
What is the legacy SIC equivalent for NAICS 327993? ▾
According to official Census Bureau concordance tables, NAICS code 327993 (Mineral Wool Manufacturing) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 3296 - Mineral Wool.
Related Pages & Tools
Further regulatory reference links for NAICS code 327993:
- 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.
- NAICS 327993 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Mineral Wool Manufacturing).
- 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.