NAICS Code 332710 — Machine Shops

National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is the only national industry under 33271 (Machine Shops).

Code	332710
Title	Machine Shops
Level	National Industry (6-digit)
Edition	NAICS 2022 edition
SBA size standard	500 employees

Official definition (2022 NAICS)

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.

Is a business under 332710 "small"?

Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 332710 qualifies as a small business if it does not exceed 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 332710 sits in the hierarchy

Level	Code	Title
Sector	31-33	Manufacturing
Subsector	332	Fabricated Metal Product Manufacturing
Industry Group	3327	Machine Shops; Turned Product; and Screw, Nut, and Bolt Manufacturing
NAICS Industry	33271	Machine Shops
National Industry	332710	Machine Shops

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
3599	Industrial and Commercial Machinery and Equipment, Not Elsewhere Classified

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.