333613 — Mechanical Power Transmission Equipment Manufacturing
Description
This U.S. industry comprises establishments primarily engaged in manufacturing mechanical power transmission equipment (except motor vehicle and aircraft), such as plain bearings, clutches (except motor vehicle and electromagnetic industrial control), couplings, joints, and drive chains (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
Exclusions & Cross-References
- Manufacturing motor vehicle power transmission equipment--are classified in Industry 336350, Motor
- Vehicle Transmission and Power Train Parts Manufacturing;
- Manufacturing aircraft power transmission equipment--are classified in U.S. Industry 336413, Other
- Aircraft Parts and Auxiliary Equipment Manufacturing;
- Manufacturing ball and roller bearings--are classified in U.S. Industry 332991, Ball and Roller Bearing
- Manufacturing; and
- Manufacturing gears, speed changers, and industrial high-speed drives (except hydrostatic)--are classified
- in U.S. Industry 333612, Speed Changer, Industrial High-Speed Drive, and Gear Manufacturing.
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 3568 - Mechanical Power Transmission Equipment, NEC (via SIC1987:3568→NAICS1997:333613→2002:333613→2007:333613→2012:333613→2017:333613→2022:333613)
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 2520 — Vehicular Power Transmission Components
- PSC 3040 — Miscellaneous Power Transmission Equipment
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 333613 valid in 2022? ▾
Yes, 333613 is a valid 6-digit 2022 NAICS national industry code representing 'Mechanical Power Transmission Equipment Manufacturing' under Sector 31-33 in the official classification index.
What is the SBA size standard for NAICS code 333613? ▾
The Small Business Administration (SBA) has established a small business size standard of 750 employees for NAICS code 333613 (Mechanical Power Transmission Equipment Manufacturing), calculated based on employees.
What is the legacy SIC equivalent for NAICS 333613? ▾
According to official Census Bureau concordance tables, NAICS code 333613 (Mechanical Power Transmission Equipment Manufacturing) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 3568 - Mechanical Power Transmission Equipment, NEC.
Related Pages & Tools
Further regulatory reference links for NAICS code 333613:
- 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 333613 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Mechanical Power Transmission Equipment Manufacturing).
- 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.