| S.no | Company Name | Founded | Country |
|---|---|---|---|
| 1 | International Crystal Laboratories | USA | |
| 2 | Guill Tool & Engineering | USA | |
| 3 | Buck Scientific Inc. | USA | |
| 4 | Diamond America | USA | |
| 5 | Berlyn ECM Inc. | USA | |
| 6 | Elizabeth Carbide Components | USA | |
| 7 | F & S Tool & Gauge Co. | USA | |
| 8 | Betar Inc. | USA | |
| 9 | Dietech Na | USA | |
| 10 | Specac | USA | |
| 11 | FireflySci Inc. | USA | |
| 12 | Crown Machine uwp Inc. | USA | |
| 13 | Transfer Tool Technologies Inc. | USA | |
| 14 | AM & M | USA | |
| 15 | Harris Machine & Design | USA | |
| 16 | Pelletizer Dies Inc. | USA |
