333998 — All Other Miscellaneous General Purpose Machinery Manufacturing
Description
This U.S. industry comprises establishments primarily engaged in manufacturing general purpose machinery (except ventilating, heating, air-conditioning, and commercial refrigeration equipment; metalworking machinery; engines, turbines, and power transmission equipment; pumps and compressors; material handling equipment; power-driven handtools; welding and soldering equipment; packaging machinery; industrial process furnaces and ovens; fluid power cylinders and actuators; and fluid power pumps and motors) (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
Illustrative Examples
- Automatic fire sprinkler systems manufacturing
- Baling machinery (e.g., paper, scrap metal) manufacturing
- Bridge and gate lifting machinery manufacturing
- Centrifuges, industrial and laboratory-type, manufacturing
- Cremating ovens manufacturing
- General purpose-type sieves and screening equipment manufacturing
- Hydraulic and pneumatic jacks manufacturing
- Industrial and general purpose-type filters (except internal combustion engine, warm air furnace) manufacturing
- Scales and balances 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 2599 - Furniture and Fixtures, NEC (via SIC1987:2599→NAICS1997:339111→2002:339111→2007:333997→2012:333997→2017:333997→2022:333998)
- SIC 3569 - General Industrial Machinery and Equipment, NEC (via SIC1987:3569→NAICS1997:333999→2002:333999→2007:333999→2012:333999→2017:333999→2022:333998)
- SIC 3596 - Scales and Balances, Except Laboratory (via SIC1987:3596→NAICS1997:333997→2002:333997→2007:333997→2012:333997→2017:333997→2022:333998)
- SIC 3599 - Industrial and Commercial Machinery and Equipment, NEC (via SIC1987:3599→NAICS1997:333999→2002:333999→2007:333999→2012:333999→2017:333999→2022:333998)
- SIC 3821 - Laboratory Apparatus and Furniture (via SIC1987:3821→NAICS1997:339111→2002:339111→2007:333997→2012:333997→2017:333997→2022:333998)
- SIC 3841 - Surgical and Medical Instruments and Apparatus (via SIC1987:3841→NAICS1997:339111→2002:339111→2007:333997→2012:333997→2017:333997→2022:333998)
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 3408 — Machining Centers and Way-Type Machines
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 333998 valid in 2022? ▾
Yes, 333998 is a valid 6-digit 2022 NAICS national industry code representing 'All Other Miscellaneous General Purpose Machinery Manufacturing' under Sector 31-33 in the official classification index.
What is the SBA size standard for NAICS code 333998? ▾
The Small Business Administration (SBA) has established a small business size standard of 700 employees for NAICS code 333998 (All Other Miscellaneous General Purpose Machinery Manufacturing), calculated based on employees.
What is the legacy SIC equivalent for NAICS 333998? ▾
According to official Census Bureau concordance tables, NAICS code 333998 (All Other Miscellaneous General Purpose Machinery Manufacturing) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 2599 - Furniture and Fixtures, NEC, 3569 - General Industrial Machinery and Equipment, NEC, 3596 - Scales and Balances, Except Laboratory, 3599 - Industrial and Commercial Machinery and Equipment, NEC, 3821 - Laboratory Apparatus and Furniture, 3841 - Surgical and Medical Instruments and Apparatus.
Related Pages & Tools
Further regulatory reference links for NAICS code 333998:
- 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 333998 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (All Other Miscellaneous General Purpose Machinery Manufacturing).
- IRS PBA Code for Machinery Manufacturing — 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.