NAICS Code 327993 — Mineral Wool Manufacturing

National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is one of 4 national industries under 32799 (All Other Nonmetallic Mineral Product Manufacturing).

Code	327993
Title	Mineral Wool Manufacturing
Level	National Industry (6-digit)
Edition	NAICS 2022 edition
SBA size standard	1,500 employees

Official definition (2022 NAICS)

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.

Cross-References.

Is a business under 327993 "small"?

Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 327993 qualifies as a small business if it does not exceed 1,500 employees. Small-business status determines eligibility for federal set-aside contracts, SAM.gov certifications and SBA loan programs — employee count is averaged over the latest 24 months.

Where 327993 sits in the hierarchy

Level	Code	Title
Sector	31-33	Manufacturing
Subsector	327	Nonmetallic Mineral Product Manufacturing
Industry Group	3279	Other Nonmetallic Mineral Product Manufacturing
NAICS Industry	32799	All Other Nonmetallic Mineral Product Manufacturing
National Industry	327993	Mineral Wool Manufacturing

Related SIC codes

Via the official U.S. Census concordance (1987 SIC ↔ NAICS), shown only where the industry definition is unchanged in NAICS 2022.

SIC code	Title
3296	Mineral Wool

Related National Industry codes

• 327991 — Cut Stone and Stone Product Manufacturing
• 327992 — Ground or Treated Mineral and Earth Manufacturing
• 327999 — All Other Miscellaneous Nonmetallic Mineral Product Manufacturing

Data: official 2022 NAICS structure, descriptions and Census concordances, U.S. Census Bureau — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.