| Allied Machining Co., Inc Milling, Turning, Welding, EDM, Grinding, Finishing, Assembly | Newington, CT | MillingTurningWeldingEDMGrindingFinishingAssembly | - |
| Mega Precision LLC Milling, Turning · ISO 9001, AS9100 | Newington, CT | MillingTurning | ISO 9001, AS9100 |
| Creed Monarch Milling, Turning, Grinding · ISO 9001 | New Britain, CT | MillingTurningGrinding | ISO 9001 |
| Grace Machine Company, LLC Milling, Turning, EDM, Grinding · ISO 9001 | Berlin, CT | MillingTurningEDMGrinding | ISO 9001 |
| Integra Cast Milling, Turning, Welding, Casting, Finishing, Assembly · ISO 9001, NADCAP | New Britain, CT | MillingTurningWeldingCastingFinishingAssembly | ISO 9001, NADCAP |
| Perry Technology Corporation Milling, Turning, EDM · ISO 9001, AS9100, ITAR, NADCAP | New Hartford, CT | MillingTurningEDM | ISO 9001, AS9100, ITAR, NADCAP |
| Progress, Inc Milling, Turning, Welding, Assembly | Newington, CT | MillingTurningWeldingAssembly | - |
| Richards Machine Tool Co Inc Milling, Turning, Assembly · ISO 9001, AS9100 | Newington, CT | MillingTurningAssembly | ISO 9001, AS9100 |
| Sirois Tool Company, Inc Milling, Turning, EDM, Grinding, Assembly | Berlin, CT | MillingTurningEDMGrindingAssembly | - |
| Century Tool Co Inc Milling, Turning, Welding, EDM, Grinding | Thompson, CT | MillingTurningWeldingEDMGrinding | - |
| Horst Engineering Milling, Turning · ISO 9001, AS9100 | East Hartford, CT | MillingTurning | ISO 9001, AS9100 |