| Rotac |
| Tri-Tronics |
| AirPro |
| Allenair Corporation |
| American Cylinder Company |
| Aurora |
| Blackhawk Molding |
| FPS Lin-Act |
| Hennells |
| Lehigh Fluid Power Inc |
| PHD Inc. |
| Rockford Air Devices |
| Tol-O-Matic |
| Chicago Cylinder Corporation |
| Origa |
| Scovill-Schrader |
| TJ Cylinder/Aeroquip |
| Tom Thumb |
| TJ Hydraulics |
| Herbert Haenchen GmbH |
| Lovejoy |
| Timken |
| Descorp |
| Bush |
| Portola |
| Rosemount |
| Donau Hydraulik |
| Portola/Velocity |
| Parker-Origa |
| Tj Cylinder |
| Wabco |
| Ortman Fluid Power |
| York |
| Valves & Cylinder |
| SpeedAire |
| T-Mac |
| Scherr Tumico |
| Motovario |
| Class-Act |
| Acona |
