| Exotic Sport Products, Inc Milling, Turning, Swiss, Grinding | North Lima, OH | MillingTurningSwissGrinding | - |
| Canyon Run Engineering Technologies Milling, Turning, EDM, Grinding, Assembly | Troy, OH | MillingTurningEDMGrindingAssembly | - |
| Commercial Metal Fabricators, Inc Milling, Turning, Laser, Waterjet, Punching, Bending, Welding | Dayton, OH | MillingTurningLaserWaterjetPunchingBendingWelding | - |
| Fredon Corp Milling, Turning, Welding, EDM, Grinding · ISO 9001, AS9100, ITAR, NADCAP | Mentor, OH | MillingTurningWeldingEDMGrinding | ISO 9001, AS9100, ITAR, NADCAP |
| General Plug and Manufacturing Co Milling, Casting, EDM, Grinding, Finishing · ISO 9001 | Oberlin, OH | MillingCastingEDMGrindingFinishing | ISO 9001 |
| Horst Manufacturing Co Inc Milling, Turning | Windham, OH | MillingTurning | - |
| Johnson Manufacturing Systems LLC Milling, Turning, Welding, Grinding | Miamisburg, OH | MillingTurningWeldingGrinding | - |
| Ketco Inc Milling | Beavercreek, OH | Milling | - |
| Premier Manufacturing Group LLC Milling, Waterjet, EDM · ISO 9001 | Miamisburg, OH | MillingWaterjetEDM | ISO 9001 |
| Princeton Tool Inc Milling, Waterjet, Casting, EDM, Grinding, Assembly · AS9100, NADCAP | Mentor, OH | MillingWaterjetCastingEDMGrindingAssembly | AS9100, NADCAP |
| Summit Machine Solutions Milling, Welding | Akron, OH | MillingWelding | - |
| Summit Machine Solutions LLC Milling, Welding, Grinding | Akron, OH | MillingWeldingGrinding | - |
| Tessec LLC Milling, Welding, EDM, Grinding, Assembly · AS9100 | Dayton, OH | MillingWeldingEDMGrindingAssembly | AS9100 |