- A C Tool Machine Co
- Advanced Machining Tech Inc
- Bohr Precision Machining
- Germantown Machine Works
- Koenig Industries Inc
- Krenn's Machine
- M & R Machining Inc
- Mahuta Tool Corp
- Mechanical Products Corp
- Precise Jig Grinding Inc
- Precision Innovations Inc
- R S Tool & Machine Inc
- Superior Metal Products Corp
