- Air Flow Research
- Air Flow Research
- Alex Precision Machine
- Alex Precision Machine
- Bernal Manufacturing
- Bernal Manufacturing
- Bluestreak Aerospace
- Bluestreak Aerospace
- Carlson Precision Engineering
- Carlson Precision Engineering
- Cassan Machine Co
- Cassan Machine Co
- Crystal Engineering
- Crystal Engineering
- EVJ Machine
- Grawax Engineering
- Hays Manufacturing
- High Tech Machining
- IPT Circle
- J & B Machine Shop
- Joseph Alziebler Co
- Kitch Engineering Inc
- Lobart Co
- M & S Machine Shop
- MND Engineer
- Pacoima Machine Shop
- Record Crank & Engine Parts
