| Ace Clearwater Enterprises Inc Milling, Laser, Waterjet, Bending, Welding, Casting | Torrance, CA | MillingLaserWaterjetBendingWeldingCasting | - |
| Beltim & Associates, LLC Milling, Turning, Swiss, Waterjet, Stamping, Casting, EDM, Finishing · ISO 9001, ITAR, ISO 13485 | Pleasanton, CA | MillingTurningSwissWaterjetStampingCastingEDMFinishing | ISO 9001, ITAR, ISO 13485 |
| Bobco Metals LLC. Welding, Casting | Los Angeles, CA | WeldingCasting | - |
| Buddy Bar Casting, LLC Milling, Casting | South Gate, CA | MillingCasting | - |
| Calidad, Inc Casting · ISO 9001, AS9100, ITAR | Ontario, CA | Casting | ISO 9001, AS9100, ITAR |
| GC International Inc Milling, Turning, Welding, Casting, Assembly · AS9100, NADCAP | Camarillo, CA | MillingTurningWeldingCastingAssembly | AS9100, NADCAP |
| General Foundry Service Corp Casting, Finishing · ISO 9001, ITAR | San Leandro, CA | CastingFinishing | ISO 9001, ITAR |
| Manufacturing Standard, LLC Milling, Turning, Swiss, Stamping, Casting · ISO 9001, AS9100, IATF 16949 | Poway, CA | MillingTurningSwissStampingCasting | ISO 9001, AS9100, IATF 16949 |
| Radian Thermal Products, Inc Milling, Casting, Finishing · ISO 9001, ITAR | Santa Clara, CA | MillingCastingFinishing | ISO 9001, ITAR |
| S R Machining, Inc Milling, Turning, Swiss, Welding, Casting · ISO 9001, AS9100 | Norco, CA | MillingTurningSwissWeldingCasting | ISO 9001, AS9100 |
| San Jose Die Casting & Machining Corp Casting | Lincoln, CA | Casting | - |
| Silicon Valley Precision Inc Milling, Turning, Welding, Casting, Grinding, Finishing · ITAR | Livermore, CA | MillingTurningWeldingCastingGrindingFinishing | ITAR |
| Wieland Techni-Cast Milling, Casting | South Gate, CA | MillingCasting | - |