| Tsubaki |
| Stock Precision |
| Schrader Pacific |
| Hans Holland |
| Horiuchi Machinery |
| Unkown |
| Cunningham |
| Samtec |
| Amphenol |
| Amphenol-Bendix |
| Pomona Electronics |
| Hewlett Packard |
| King’s Electronics |
| Pepperl+Fuchs |
| Shcmersal |
| Industrial Timer Company (ITC) |
| HKA |
| Ball & Jewell |
| Showa |
| Federal Signal Corporation |
| Entrelec |
| Micro Switch |
| Advantage Electronics |
| Magnecraft & Struthers-Dunn |
| Precision Control Products |
| Moeller |
| Berry Bearing |
| Edwards |
| Control Products |
| Novar Controls Corporation |
| Air Compressor Engineering |
| Opto 22 |
| Control Concepts Inc. |
| Klockner Moeller |
| AMF-Potter & Brumfield |
| Ward Leonard |
| Sprecher + Schuh |
| Challenger |
| Paragon |
| Gates |
