332710 — Machine Shops
Description
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 (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
Exclusions & Cross-References
- 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
Overview Facts
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 3599 - Industrial and Commercial Machinery and Equipment, NEC (via SIC1987:3599→NAICS1997:33271→2002:332710→2007:332710→2012:332710→2017:332710→2022:332710)
Suggested Product Service Codes (Advisory)
The following Product Service Codes (PSCs) are advisory suggestions aligned with this NAICS code. Note: NAICS and PSC codes map to different dimensions of procurement (industry vs. product/service). There is no official binding 1:1 crosswalk.
- PSC 3470 — Machine Shop Sets, Kits, and Outfits
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 332710 valid in 2022? ▾
Yes, 332710 is a valid 6-digit 2022 NAICS national industry code representing 'Machine Shops' under Sector 31-33 in the official classification index.
What is the SBA size standard for NAICS code 332710? ▾
The Small Business Administration (SBA) has established a small business size standard of 500 employees for NAICS code 332710 (Machine Shops), calculated based on employees.
What is the legacy SIC equivalent for NAICS 332710? ▾
According to official Census Bureau concordance tables, NAICS code 332710 (Machine Shops) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 3599 - Industrial and Commercial Machinery and Equipment, NEC.
Related Pages & Tools
Further regulatory reference links for NAICS code 332710:
- Sector 31-33 Directory Hub — List of related industries in the Manufacturing sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- NAICS 332710 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Machine Shops).
- IRS PBA Code for CNC Machining — Principal Business Activity tax reporting details.
- IRS PBA Code for Machine Shops — Principal Business Activity tax reporting details.
- IRS PBA Code for Metal Fabrication — Principal Business Activity tax reporting details.
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.