NAICS Code 423810 — Construction and Mining (except Oil Well) Machinery and Equipment Merchant Wholesalers

National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is the only national industry under 42381 (Construction and Mining (except Oil Well) Machinery and Equipment Merchant Wholesalers).

Code	423810
Title	Construction and Mining (except Oil Well) Machinery and Equipment Merchant Wholesalers
Level	National Industry (6-digit)
Edition	NAICS 2022 edition
SBA size standard	250 employees

Official definition (2022 NAICS)

This industry comprises establishments primarily engaged in the merchant wholesale distribution of specialized machinery, equipment, and related parts generally used in construction, mining (except oil well), and logging activities.

Illustrative Examples:

Excavating machinery and equipment merchant wholesalers

Road construction and maintenance machinery merchant wholesalers

Forestry machinery and equipment merchant wholesalers

Scaffolding merchant wholesalers

Mining cranes merchant wholesalers

Cross-References.

Is a business under 423810 "small"?

Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 423810 qualifies as a small business if it does not exceed 250 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 423810 sits in the hierarchy

Level	Code	Title
Sector	42	Wholesale Trade
Subsector	423	Merchant Wholesalers, Durable Goods
Industry Group	4238	Machinery, Equipment, and Supplies Merchant Wholesalers
NAICS Industry	42381	Construction and Mining (except Oil Well) Machinery and Equipment Merchant Wholesalers
National Industry	423810	Construction and Mining (except Oil Well) Machinery and Equipment 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
5082	Construction and Mining (Except Petroleum) Machinery and Equipment

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.