- Accurate Technologies
- Applied Precision Products
- Cal Hightech
- Channel Islands Opto-Mech Engr
- Company C
- Epsilon Industrial
- Gaiser Tool Co
- H M Co
- Magnum Engineering
- Mastercraft Engineering
- Preferred Machining
- R K Automotive Machining Specs
- RCO Enterprises
- Saline Enterprises
- Sterner Tool
- Sundance Precision
- Swiss Productions Inc
- Trumar Precision
- Union Tool Co
- Ventura Cylinderhead & Machine
