All Other Miscellaneous General Purpose Machinery Manufacturing
Official NAICS Description
Source: U.S. Census Bureau 2022 NAICS
📘 Source: U.S. Census Bureau — 2022 NAICS Manual
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
✓ Small Business Eligibility at a Glance
Based on SBA Table of Small Business Size Standards (2024)
Size Standard
700 employees
Measurement Period
Current count
Standard Type
Employee-Based
Applies To
All contracts under NAICS 333998
Set-Aside Programs
8(a), WOSB, HUBZone, SDVOSB
Certification Required
No (self-certify in SAM.gov)
Size standards are set by the SBA and reviewed periodically. Always verify at SBA.gov before bidding.
Cross-References
The following activities are classified elsewhere in the NAICS system:
→Manufacturing ventilating, heating, air-conditioning (except motor vehicle), and commercial refrigeration equipment--are classified in Industry 33341, Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing;
→Manufacturing motor vehicle air-conditioning systems and compressors--are classified in Industry 336390, Other Motor Vehicle Parts Manufacturing;
→Manufacturing material handling equipment--are classified in Industry 33392, Material Handling Equipment Manufacturing;
→Manufacturing power-driven handtools--are classified in U.S. Industry 333991, Power-Driven Handtool Manufacturing;
→Manufacturing welding and soldering equipment (except handheld soldering irons)--are classified in U.S. Industry 333992, Welding and Soldering Equipment Manufacturing;
→Manufacturing packaging machinery--are classified in U.S. Industry 333993, Packaging Machinery Manufacturing;
→Manufacturing bakery ovens--are classified in U.S. Industry 333241, Food Product Machinery Manufacturing;
→Manufacturing cement, wood, and chemical kilns--are classified in U.S. Industry 333248, All Other Industrial Machinery Manufacturing;
→Manufacturing industrial process furnaces and ovens (except bakery)--are classified in U.S. Industry 333994, Industrial Process Furnace and Oven Manufacturing;
→Manufacturing fluid power cylinders and actuators--are classified in U.S. Industry 333995, Fluid Power Cylinder and Actuator Manufacturing;
→Manufacturing fluid power pumps and motors--are classified in U.S. Industry 333996, Fluid Power Pump and Motor Manufacturing;
→Manufacturing carnival and amusement park equipment, automotive maintenance equipment, and coin- or card-operated vending machines--are classified in Industry 333310, Commercial and Service Industry Machinery Manufacturing;
→Manufacturing motor vehicle engine filters and pumps--are classified in Industry Group 3363, Motor Vehicle Parts Manufacturing; and
→Manufacturing mechanical jacks--are classified in U.S. Industry 332216, Saw Blade and Handtool Manufacturing.
How to Use NAICS 333998 in SAM.gov
NAICS code 333998 — All Other Miscellaneous General Purpose Machinery Manufacturing — is used in SAM.gov to identify businesses whose primary activity falls within this classification. When you add this code to your SAM.gov entity registration, contracting officers searching for vendors in the Other General Purpose Machinery Manufacturing space will be able to find your business.
If this code represents your primary business activity, designate it as your primary NAICS code. Your primary NAICS code determines your size standard for any contract solicited under this code. With a size standard of 700 employees, your business must be at or below this threshold to qualify as a small business for set-aside contracts under NAICS 333998.
NAICS code 333998 is 'All Other Miscellaneous General Purpose Machinery Manufacturing', classified under the Manufacturing sector (NAICS 33). This U.S. industry comprises establishments primarily engaged in manufacturing general purpose machinery (except ventilating, heating, air-conditioning, and commercial refrigeration equipment; metalwo
What is the SBA small business size standard for NAICS code 333998?
The SBA defines a small business under NAICS code 333998 (All Other Miscellaneous General Purpose Machinery Manufacturing) as one with 700 employees. This size standard determines eligibility for small business set-aside contracts, 8(a), HUBZone, WOSB, and SDVOSB programs in SAM.gov.
How do I register NAICS code 333998 in SAM.gov?
To register NAICS code 333998 in SAM.gov: (1) Log in at sam.gov, (2) Navigate to your Entity Registration, (3) Go to the Assertions section, (4) Add 333998 (All Other Miscellaneous General Purpose Machinery Manufacturing) to your NAICS code list. You may designate one code as your Primary NAICS code.