NAICS Code 423490 — Other Professional Equipment and Supplies Merchant Wholesalers

National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is the only national industry under 42349 (Other Professional Equipment and Supplies Merchant Wholesalers).

Code	423490
Title	Other Professional Equipment and Supplies Merchant Wholesalers
Level	National Industry (6-digit)
Edition	NAICS 2022 edition
SBA size standard	150 employees

Official definition (2022 NAICS)

This industry comprises establishments primarily engaged in the merchant wholesale distribution of professional equipment and supplies (except ophthalmic goods and medical, dental, and hospital equipment and supplies).

Illustrative Examples:

Church supplies (except silverware, plated ware) merchant wholesalers

School equipment and supplies (except books, furniture) merchant wholesalers

Drafting tables and instruments merchant wholesalers

Scientific instruments merchant wholesalers

Laboratory equipment (except medical, dental) merchant wholesalers

Surveying equipment and supplies merchant wholesalers

Is a business under 423490 "small"?

Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 423490 qualifies as a small business if it does not exceed 150 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 423490 sits in the hierarchy

Level	Code	Title
Sector	42	Wholesale Trade
Subsector	423	Merchant Wholesalers, Durable Goods
Industry Group	4234	Professional and Commercial Equipment and Supplies Merchant Wholesalers
NAICS Industry	42349	Other Professional Equipment and Supplies Merchant Wholesalers
National Industry	423490	Other Professional Equipment and Supplies Merchant Wholesalers

Related SIC codes

Via the official U.S. Census concordance (1987 SIC ↔ NAICS), shown only where the industry definition is unchanged in NAICS 2022.

SIC code	Title
5049	Professional Equipment and Supplies, Not Elsewhere Classified

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.