2022 NAICS national industry in sector 31-33 Manufacturing
332710 Machine Shops
NAICS 332710 is the US industry code for machine shops. It covers establishments known as machine shops primarily engaged in machining metal and plastic parts and parts of other composite materials on a job or order basis.
- Code
- 332710 (2022 NAICS)
- Title
- Machine Shops
- Part of
- Machine Shops; Turned Product; and Screw, Nut, and Bolt Manufacturing
- SBA small business limit
- Up to 500 employees
- Closest UK SIC
- 25920 (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 industry comprises establishments known as machine shops primarily engaged in machining metal and plastic parts and parts of other composite materials on a job or order basis. Generally machine shop jobs are low volume using machine tools, such as lathes (including computer numerically controlled); automatic screw machines; and machines for boring, grinding, milling, and additive manufacturing.
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Machining precision products, known as precision turned manufacturers are classified in U.S. Industry 332721, Precision Turned Product Manufacturing.
- Manufacturing metal bolts, nuts, screws, rivets, washers, and other industrial fasteners using machines, such as headers, threaders, and nut forming machines are classified in U.S. Industry 332722, Bolt, Nut, Screw, Rivet, and Washer Manufacturing.
- Manufacturing stampings (except motor vehicle) are classified in U.S. Industry 332119, Metal Crown, Closure, and Other Metal Stamping (except Automotive).
- Manufacturing weldments and fabricated metal plate products are classified in U.S. Industry 332313, Plate Work Manufacturing.
- Coating, engraving, and heat treating metals and metal formed products fabricated elsewhere are classified in Industry 33281, Coating, Engraving, Heat Treating, and Allied Activities.
- Manufacturing foundry patterns are classified in U.S. Industry 332999, All Other Miscellaneous Fabricated Metal Product Manufacturing.
- Manufacturing motor vehicle stampings are classified in Industry 336370, Motor Vehicle Metal Stamping.
- Repairing industrial machinery and equipment are classified in Industry 811310, Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance.
Activities listed under 332710
The Census index assigns these 3 activities to this code. If your business matches one, this is your code.
- Automotive machine shops
- Chemical milling job shops
- Machine shops
SBA size standard for 332710
To count as a small business for SBA loans and federal contracts under NAICS 332710, your business (including affiliates) must not exceed 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: 2592), so treat them as a starting point and check the definition.
Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.
Data last changed November 14, 2026. How this page is built.