NAICS Code 333998 — All Other Miscellaneous General Purpose Machinery Manufacturing

National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is one of 7 national industries under 33399 (All Other General Purpose Machinery Manufacturing).

Code	333998
Title	All Other Miscellaneous General Purpose Machinery Manufacturing
Level	National Industry (6-digit)
Edition	NAICS 2022 edition
SBA size standard	700 employees

Official definition (2022 NAICS)

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).

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

Is a business under 333998 "small"?

Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 333998 qualifies as a small business if it does not exceed 700 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 333998 sits in the hierarchy

Level	Code	Title
Sector	31-33	Manufacturing
Subsector	333	Machinery Manufacturing
Industry Group	3339	Other General Purpose Machinery Manufacturing
NAICS Industry	33399	All Other General Purpose Machinery Manufacturing
National Industry	333998	All Other Miscellaneous General Purpose Machinery Manufacturing

No direct SIC mapping is shown for this code: it was introduced or redefined after the official 1987 SIC ↔ 2002 NAICS concordance. Use the crosswalk tool to explore related legacy codes.

Related National Industry codes

• 333991 — Power-Driven Handtool Manufacturing
• 333992 — Welding and Soldering Equipment Manufacturing
• 333993 — Packaging Machinery Manufacturing
• 333994 — Industrial Process Furnace and Oven Manufacturing
• 333995 — Fluid Power Cylinder and Actuator Manufacturing
• 333996 — Fluid Power Pump and Motor Manufacturing

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.