Iron Ball Manufacturers
| Berwick Steel Co (Piqua, OH) |
| Best Metal Corp (Woodstock, IL) |
| Bohler-Uddeholm Corp (Wood Dale, IL) |
| Botts, J H Inc (Joliet, IL) |
| Bulk Manufacturing of Florida (Plant City, FL)
Contract Manufacturer |
| C T P Corp (Indianapolis, IN) |
| Carbide Technologies Inc (Fraser, MI) |
| Cargill Inc (East Chicago, IN) |
| Carlson, G O Inc (Thorndale, PA) |
| Carpenter Technology Corp (Reading, PA) |
| Chatham Steel Corp (Savannah, GA) |
| Cincinnati Steel Products Co (Cincinnati, OH) |
| Cooper Standard Automotive (Auburn Hills, MI) |
| Crucible Research (Pittsburgh, PA) |
| Delta Tube & Fabrication (Holly, MI) |
| Dietrich Industries Inc (Hammond, IN) |
| EMJ Co (Twinsburg, OH) |
| Fansteel American Sintered (Emporium, PA) |
| Federal-Mogul Corp (Logansport, IN) |
| Feralloy Corp (Chicago, IL) |
| Frederick Steel Co (Cincinnati, OH) |
| Fry Technologies (Altoona, PA) |
| Grant, Louis A Inc (Export, PA) |
| Harsco Corp (Camp Hill, PA) |
| Hawk Corp (Cleveland, OH) |
