Primary Metals
    Name       Primary Industry |
City |
    AFFCO Inc. | Anaconda |
Ferrous Metal Foundries |
|
    American Chemet Corporation | East Helena |
Secondary Smelting, Refining, and Alloying of Copper |
|
    Montana Hammer and Forge | Eureka |
Iron and Steel Forging |
|
    Montana Precision Products | Butte |
Ferrous Metal Foundries |
|
    Northwest Parts & Rigging Co I | Kalispell |
Alumina and Aluminum Production and Processing |
|
    Stillwater Mining Co. | Nye |
Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum) |
|
    Timberline Tool & Casting | Whitefish |
Aluminum Die-Casting Foundries |