NAICS code 333131: Mining Machinery and Equipment Manufacturing

NAICS 333131 is “Mining Machinery and Equipment Manufacturing”. This U.S. industry comprises establishments primarily engaged in (1) manufacturing underground mining machinery and equipment, such as coal breakers, mining cars, core drills, coal cutters, and rock drills, and (2) manufacturing mineral beneficiating machinery and equipment used in surface or underground mines.

Examples from the U.S. Census Bureau: Amalgamators (i.e., metallurgical and mining machinery) manufacturing; Augers, mining-type, manufacturing; Bits, rock drill, underground mining-type, manufacturing; Breakers, coal, manufacturing; Cars, mining, manufacturing; and Cleaning machinery, mining-type, manufacturing.

Businesses mainly manufacturing surface mining machinery and equipment are classified in Industry 333120, Construction Machinery Manufacturing; manufacturing well drilling machinery are classified in U.S. Industry 333132, Oil and Gas Field Machinery and Equipment Manufacturing; and manufacturing coal and ore conveyors are classified in U.S. Industry 333922, Conveyor and Conveying Equipment Manufacturing.

900 employees (average over the last 24 months), including affiliates. Source: 13 CFR 121.201, effective March 17, 2023.

SIC 3532 (Mining Machinery and Equipment, Except Oil and Gas Field Machinery and Equipment), from the U.S. Census Bureau concordances (1987 SIC → 2002 NAICS, carried to 2022 NAICS).

333000 (Machinery mfg.) on Schedule C, line B, from the IRS list of principal business codes. The IRS code covers NAICS 333111–333998.

Federal agencies put a NAICS code on each solicitation in SAM.gov, and some states and cities use NAICS codes too. Add 333131 to your SAM.gov registration and to your bid alerts; PublicBeam emails new bids for the codes you choose every morning.