NAICS 333998

Overview

The North American Industry Classification System (NAICS) is the production-oriented standard federal statistical agencies use to classify business establishments for collecting, analyzing, and publishing data about the U.S. economy. Developed under the Office of Management and Budget (OMB) and adopted in 1997, NAICS was created jointly by the United States, Canada, and Mexico. The current vintage is 2022. ¹

NAICS 333998 — All Other Miscellaneous General Purpose Machinery Manufacturing — is part of the Other General Purpose Machinery group (33399). It is used when general-purpose machinery manufacturing activity does not fall into specific industries such as packaging machinery, welding equipment, or fluid power components, reflecting 2022 definitions and examples for the industry. ²

See also on G2X:

• G2X — NAICS 333998 overview
• G2X — NAICS 333999
• G2X — NAICS 333993

What this NAICS covers

• Automatic fire sprinkler systems manufacturing. ²
• Baling machinery (e.g., paper, scrap metal) manufacturing. ²
• Bridge and gate lifting machinery manufacturing. ²
• Cremating ovens manufacturing. ²
• General-purpose sieves and screening equipment manufacturing. ²
• Other general-purpose machinery not classified in specific 33399 industries (e.g., not power-driven handtools, welding equipment, packaging machinery). ²

Related NAICS and PSC codes

Industry boundaries and common exclusions

• Equipment in ventilation, heating, air-conditioning, and commercial refrigeration is classified in 33341, not in the miscellaneous general-purpose category. ²
• Power-driven handtools fall under 333991; welding and soldering equipment is 333992; packaging machinery is 333993 — all excluded from the “all other miscellaneous” industry. ²
• Industrial process furnaces and ovens belong to 333994; cremating ovens are the exception that are classified in the miscellaneous general-purpose category. ²
• Fluid power pumps/motors and cylinders/actuators are classified in 333996 and 333995, not in the miscellaneous category. ²

Frequently asked questions

• What does NAICS 333998 represent in 2022 NAICS?

  • It is the U.S. industry code for “All Other Miscellaneous General Purpose Machinery Manufacturing,” used for general-purpose machinery not covered by more specific 33399 industries. ²

• How was 2022 NAICS implemented across federal statistical programs?

  • Census implemented the 2022 NAICS beginning with the 2022 Economic Census; other programs follow the Census implementation timeline for transitioning their series. ³

• Which kinds of products fall into 333998 versus adjacent codes like 333993 or 333992?

  • Packaging machinery (333993) and welding/soldering equipment (333992) are explicitly classified outside the “all other miscellaneous” industry; 333998 covers remaining general-purpose machinery not otherwise specified. ²

• What is the small business size standard for NAICS 333998?

  • SBA sets industry-specific size standards used in federal contracting. Consult SBA’s Table of Small Business Size Standards to confirm the current employee-based threshold for 333998, as SBA updates may change the applicable limit. ⁴

• Where can official descriptions and examples for this machinery group be found?

  • The Census NAICS 2022 page provides the official description, examples, and cross-references for 333998 within the Other General Purpose Machinery group. ²

Useful resources

• G2X — NAICS 333998 overview
• Economic Census: NAICS Codes & Understanding Industry Classification Systems (Census). ¹
• Census NAICS 2022 page for 333998 (official description and examples). ²
• The Census Bureau’s implementation of the 2022 NAICS (timelines and adoption). ³
• SBA: Size standards (overview and links to the current table). ⁴

References

1. U.S. Census Bureau — Economic Census: NAICS Codes & Understanding Industry Classification Systems. https://www.census.gov/programs-surveys/economic-census/year/2022/technical-documentation/code-lists/understanding-naics-redirect.html
2. U.S. Census Bureau — NAICS 2022 Code 333998: All Other Miscellaneous General Purpose Machinery Manufacturing. https://www.census.gov/naics/?input=333998&year=2022&details=333998
3. U.S. Census Bureau — The Census Bureau’s Implementation of the 2022 NAICS (adoption schedule). https://www.census.gov/library/reference/code-lists/naics/2022/implementation-timeline.html
4. U.S. Small Business Administration — Size standards (overview and current table links). https://www.sba.gov/federal-contracting/contracting-guide/size-standards