NAICS 423490

Overview

The North American Industry Classification System classifies establishments for statistical reporting across U.S. federal programs. Developed jointly by the United States, Canada, and Mexico, NAICS replaced the SIC system in 1997 and is maintained through the Office of Management and Budget; the current vintage is 2022 with updates every five years. ¹
NAICS 423490 covers merchant wholesalers of “other professional equipment and supplies” not captured by more specific professional and commercial equipment wholesaling industries in subsector 4234 (e.g., photographic, office, computer, medical/dental, ophthalmic, or other commercial equipment). It is a residual category used when a wholesaling activity falls outside the more detailed 4234 industries. ²

See also on G2X:

• G2X — NAICS 423490 overview
• G2X — NAICS 423450
• G2X — NAICS 423440

What this NAICS covers

• Merchant wholesaling of specialized professional equipment and supplies that do not fit the specific professional/commercial wholesaling industries within NAICS 4234. ²
• Business-to-business distribution as part of the intermediate stage of the supply chain; typical wholesale operations are conducted from warehouses/offices with limited public retail display. ³
• Wholesale activities conducted on own account as merchant wholesalers (not agents/brokers); agencies arranging sales for others are classified under NAICS 425120. ⁴
• Provision of services incidental to the sale of merchandise (e.g., sorting, packaging, labeling, kitting) without transforming the goods. ⁵
• Sales of capital/professional-grade goods primarily to institutional, commercial, and governmental customers rather than to consumers. ³
• Excludes wholesaling classified in more specific 4234 industries, such as 423410, 423420, 423430, 423450, 423460, and 423440. ²

Related NAICS and PSC codes

SBA small business size standard (contracting context)

• Under SBA’s Table of Small Business Size Standards, NAICS 423490 has an employee-based size standard of 150 employees. ⁷
• For supply acquisitions, firms qualifying under the “nonmanufacturer rule” are deemed small at 500 or fewer employees if they meet the conditions in 13 CFR 121.406. ⁸

Frequently asked questions

• How is NAICS 423490 differentiated from other 4234 industries?
  NAICS 423490 is a residual category for professional equipment/supplies wholesaling not captured by more specific industries such as 423410, 423440, 423450, or 423460. It is used when activities do not align to those defined industries. ²
  See also on G2X — NAICS 423440.

• What is the SBA size standard for NAICS 423490?
  SBA sets the small business size standard for NAICS 423490 at 150 employees. In supply procurements, the nonmanufacturer rule may also apply if regulatory criteria are met. ⁷

• Where are official statistics for this industry published?
  The Economic Census publishes NAICS-based tables at the sector and detailed industry levels for Wholesale Trade (42). Depending on release cycles, 6-digit industries such as 423490 appear in Economic Census outputs. ⁶

• Did the 2022 NAICS revision change NAICS 423490?
  Specific code-level changes for 423490 are not identified in high-level revision summaries. Not specified by official sources. ⁹

• What functions characterize wholesalers in this subsector?
  Merchant wholesalers sell on their own account, typically from warehouses, and may provide services incidental to sales rather than transforming goods. Agents and brokers that arrange sales for others are classified elsewhere (e.g., 425120). ³

Useful resources

• Census — NAICS 423490 official description (2022). ²
• Census — Implementation of the 2022 NAICS (timeline and overview). ⁹
• Census — Annual Wholesale Trade Survey (scope and NAICS coverage). ⁵
• Census — Economic Census data tables (Sector 42). ⁶

References

1. U.S. Census Bureau — Industry and Occupation Classification: About Industry (NAICS background, OMB, 1997 adoption, five-year updates). https://www.census.gov/topics/employment/industry-occupation/about/industry.html
2. U.S. Census Bureau — 2022 NAICS Code 423490: Other Professional Equipment and Supplies Merchant Wholesalers (official description). https://www.census.gov/naics/?input=423490&year=2022&details=423490
3. U.S. Census Bureau — 2022 NAICS Sector 42: Wholesale Trade (sector description and scope). https://www.census.gov/naics/?input=42&year=2022
4. U.S. Census Bureau — 2022 NAICS Code 425120: Wholesale Trade Agents and Brokers. https://www.census.gov/naics/?input=425120&year=2022&details=425120
5. U.S. Census Bureau — Annual Wholesale Trade Survey: FAQs (scope and wholesale definition, incidental services). https://www.census.gov/programs-surveys/awts/about/faq.html
6. U.S. Census Bureau — Economic Census: Data Tables (industry-level NAICS outputs, including Sector 42). https://www.census.gov/programs-surveys/economic-census/data/tables.html
7. eCFR — 13 CFR part 121, Appendix A to Part 121: Small Business Size Standards by NAICS (employee-based standard for NAICS 423490). https://www.ecfr.gov/current/title-13/part-121/appendix-Appendix%20A%20to%20Part%20121
8. eCFR — 13 CFR 121.406: How does a small business qualify as a nonmanufacturer? (500-employee threshold and conditions). https://www.ecfr.gov/current/title-13/section-121.406
9. U.S. Census Bureau — Implementation of the 2022 NAICS (overview and adoption timeline). https://www.census.gov/library/reference/code-lists/naics/2022/implementation-timeline.html