NAICS 333999

All Other Miscellaneous General Purpose Machinery Manufacturing

Key Figures

Establishments
1,426
Census CBP · 2023
Employment
63,498
Census CBP · 2023
Market size
$16.5B
Census Economic Census · 2017

Figures are published for NAICS 333999 directly.

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Official definition

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; fluid power pumps and motors; and scales and balances).

Source: US Census Bureau, 2017 NAICS Definitions. Public domain.

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

Which code does this activity belong in?

NAICS 333999 covers general purpose machinery manufacturing activities not assigned to more specialized codes. Establishments manufacturing power-driven handtools, welding equipment, packaging machinery, industrial furnaces and ovens, fluid power components, or scales and balances belong in their respective dedicated industries. The code captures the residual category of general purpose machines, such as baling equipment, centrifuges, fire sprinkler systems, and screening machinery, where manufacturing is the primary activity and the equipment serves broad industrial purposes rather than fitting a narrower equipment classification.

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