2022 NAICS national industry in sector 31-33 Manufacturing
335991 Carbon and Graphite Product Manufacturing
NAICS 335991 is the US industry code for carbon and graphite product manufacturing. This U.S.
- Code
- 335991 (2022 NAICS)
- Title
- Carbon and Graphite Product Manufacturing
- Part of
- All Other Electrical Equipment and Component Manufacturing
- SBA small business limit
- Up to 900 employees
- Closest UK SIC
- 23990, 27900 (details)
Changes coming. The NAICS 2027 revision applies to data from 1 January 2027, and SBA proposed new size standards on 20 August 2026. The values on this page are the ones in force today; we update this page when the official files change.
Official definition
This U.S. industry comprises establishments primarily engaged in manufacturing carbon, graphite, and metal-graphite brushes and brush stock; carbon or graphite electrodes for thermal and electrolytic uses; carbon and graphite fibers; and other carbon, graphite, and metal-graphite products.
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Establishments primarily engaged in manufacturing carbon or graphite gaskets are classified in U.S. Industry 339991, Gasket, Packing, and Sealing Device Manufacturing.
Activities listed under 335991
The Census index assigns these 19 activities to this code. If your business matches one, this is your code.
- Brush blocks, carbon or molded graphite, manufacturing
- Brushes and brush stock contacts, electric, carbon and graphite, manufacturing
- Brushplates, carbon or graphite, manufacturing
- Carbon electrodes and contacts, electric, manufacturing
- Carbon specialties for aerospace use (except gaskets) manufacturing
- Carbon specialties for electrical use manufacturing
- Carbon specialties for mechanical use (except gaskets) manufacturing
- Carbons, electric, manufacturing
- Carbons, lighting, manufacturing
- Contacts, electrical, carbon and graphite, manufacturing
- Electrodes for thermal and electrolytic uses, carbon and graphite, manufacturing
- Fibers, carbon and graphite, manufacturing
- Graphite electrodes and contacts, electric, manufacturing
- Graphite specialties for aerospace use (except gaskets) manufacturing
- Graphite specialties for electrical use manufacturing
- Graphite specialties for mechanical use (except gaskets) manufacturing
- Heat shields, carbon or graphite, manufacturing
- Lighting carbons manufacturing
- Metal-graphite products manufacturing
SBA size standard for 335991
To count as a small business for SBA loans and federal contracts under NAICS 335991, your business (including affiliates) must not exceed 900 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: 2399, 2790), so treat them as a starting point and check the definition.
- 23990Manufacture of other non-metallic mineral products n.e.c.UK SIC
- 27900Manufacture of other electrical equipmentUK SIC
Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.
Similar codes to compare
Data last changed November 14, 2026. How this page is built.