| Computer Integrated Machining Inc Milling, Turning, Waterjet, Welding, Stamping, EDM, Grinding, Assembly · ISO 9001, ITAR | Santee, CA | MillingTurningWaterjetWeldingStampingEDMGrindingAssembly | ISO 9001, ITAR |
| Ap Precision Metals, Inc Laser, Punching, Bending, Welding, Stamping, Finishing, Assembly · ISO 9001 | San Diego, CA | LaserPunchingBendingWeldingStampingFinishingAssembly | ISO 9001 |
| Five Star Enterprises Milling, Laser, Waterjet, Welding, Stamping, Metal AM, EDM, Finishing | San Marcos, CA | MillingLaserWaterjetWeldingStampingMetal AMEDMFinishing | - |
| Haig Precision Manufacturing Corp Milling, Turning, Laser, Punching, Bending, Welding, Stamping, EDM, Grinding, Finishing, Assembly | San Jose, CA | MillingTurningLaserPunchingBendingWeldingStampingEDMGrindingFinishingAssembly | - |
| Scandic Springs, Inc Stamping · ISO 9001 | San Leandro, CA | Stamping | ISO 9001 |
| Scotia Engineering, Inc Milling, Waterjet, Bending, Welding, Stamping, EDM, Grinding, Assembly | Santa Fe Springs, CA | MillingWaterjetBendingWeldingStampingEDMGrindingAssembly | - |
| Rincon Engineering Corporation Milling, Turning, Laser, Waterjet, Punching, Welding, Stamping, EDM, Finishing · ISO 9001, AS9100 | Carpinteria, CA | MillingTurningLaserWaterjetPunchingWeldingStampingEDMFinishing | ISO 9001, AS9100 |
| True Precision Machining, Inc Milling, Turning, Swiss, Welding, Stamping, EDM, Grinding, Finishing · ISO 9001, AS9100, ITAR, CMMC | Buellton, CA | MillingTurningSwissWeldingStampingEDMGrindingFinishing | ISO 9001, AS9100, ITAR, CMMC |