- Allied Threaded Metals
- G T Brentmark
- G T Brentmark
- Gretna Machine Shop
- Gretna Machine Shop
- Grider Precision Machining
- Grider Precision Machining
- HMC Instrument & Machine Work
- HMC Instrument & Machine Work
- K & E Instrument Co
- K & E Instrument Co
- Lesco Wells Manufacturing
- Lesco Wells Manufacturing
- M & R Machine Work Inc
- M & R Machine Work Inc
- Meta-Tech Inc
- Meta-Tech Inc