327993 Mineral Wool Manufacturing

Official definition

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.

Source: US Census Bureau, 2022 NAICS descriptions.

When to use a different code

Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:

• 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.

Source: US Census Bureau, 2022 NAICS cross-references.

Activities listed under 327993

The Census index assigns these 4 activities to this code. If your business matches one, this is your code.

• Fiberglass insulation products manufacturing
• Insulating batts, fills, or blankets, fiberglass, manufacturing
• Mineral wool insulation materials manufacturing
• Mineral wool products (e.g., board, insulation, tile) manufacturing

Source: US Census Bureau, 2022 NAICS index file.

SBA size standard for 327993

To count as a small business for SBA loans and federal contracts under NAICS 327993, your business (including affiliates) must not exceed 1,500 employees. Check your business.

Source: SBA table of size standards, effective March 17, 2023.

Closest UK SIC 2007 codes

There is no official one-to-one link between NAICS and UK SIC. These codes share the same international class (ISIC Rev. 4: 2310, 2399), so treat them as a starting point and check the definition.

• 23990Manufacture of other non-metallic mineral products n.e.c.UK SIC

Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.

Similar codes to compare

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