Name       Primary Industry

City

Benjamin Aviation & Machines	Fort Benton
Heating Equipment (except Warm Air Furnaces) Manufacturing - Heating Equipment, Except Electric and Warm Air Furnaces
D & S Heating and Sheet Metal	Roundup
Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing (except motor vehicle air-conditioning)
HCR Inc	Lewistown
Industrial and Commercial Fan and Blower Manufacturing
Valley Sheet Metal Inc	Hamilton
Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing