| Elliptical Sheet Metal Mfg LLC Milling, Punching, Bending, Welding | Huntington Beach, CA | MillingPunchingBendingWelding | - |
| Joels Machine Shop Inc Milling, Turning, Grinding | El Monte, CA | MillingTurningGrinding | - |
| Elco Machine Company Milling, Turning, Finishing | San Luis Obispo, CA | MillingTurningFinishing | - |
| Electron Plating III, Inc Finishing · ITAR, NADCAP | Garden Grove, CA | Finishing | ITAR, NADCAP |
| A4 Welding Inc. Welding | Riverside, CA | Welding | - |
| Amador Steel and Supply, LLC Milling, Punching, Bending, Welding | Jackson, CA | MillingPunchingBendingWelding | - |
| Bob’s Welding, Machining & Fabrication, Inc. Bending, Welding | Anaheim, CA | BendingWelding | - |
| Campbell Engineering Milling, Welding, EDM, Finishing, Assembly · ISO 9001, ITAR | Lake Forest, CA | MillingWeldingEDMFinishingAssembly | ISO 9001, ITAR |
| Delta Hi-Tech Milling, Turning, Swiss, Laser, Bending, Welding, EDM, Finishing, Assembly · ISO 9001, AS9100, ITAR, NADCAP, ISO 13485 | Chatsworth, CA | MillingTurningSwissLaserBendingWeldingEDMFinishingAssembly | ISO 9001, AS9100, ITAR, NADCAP, ISO 13485 |
| Delta One Manufacturing LLC Milling, Turning, Laser, Welding, Finishing, Assembly | San Jose, CA | MillingTurningLaserWeldingFinishingAssembly | - |
| deMel Fabrication Bending, Laser, Welding | Anaheim, CA | BendingLaserWelding | - |
| Electronic Carbide, Inc Milling, Turning, EDM, Grinding · ITAR | Grass Valley, CA | MillingTurningEDMGrinding | ITAR |
| Element Machine Milling, Turning · ISO 9001, AS9100 | Anaheim, CA | MillingTurning | ISO 9001, AS9100 |
| Elite Machining & Engineering Services LLC Milling, EDM | Yorba Linda, CA | MillingEDM | - |
| General Industrial Repair Milling, Turning, Welding, Grinding | Montebello, CA | MillingTurningWeldingGrinding | - |
| Helical Machining, Inc Milling, Turning, Welding, EDM, Grinding, Finishing, Assembly | Sun Valley, CA | MillingTurningWeldingEDMGrindingFinishingAssembly | - |
| Jerry's Welding & Machine Welding | San Diego, CA | Welding | - |
| Kern Steel Fabrication Inc Bending, Welding · ISO 9001 | Bakersfield, CA | BendingWelding | ISO 9001 |
| Melton Sheet Metal Bending, Welding | Fresno, CA | BendingWelding | - |
| Morena Welding Inc Welding | San Diego, CA | Welding | - |
| Nelgo Manufacturing Co Milling, Turning, Punching, Welding · ISO 9001, AS9100, ITAR | Oceanside, CA | MillingTurningPunchingWelding | ISO 9001, AS9100, ITAR |
| Nocturnal Welding Welding | Camarillo, CA | Welding | - |
| Olson & Co. Steel Welding | Fresno, CA | Welding | - |
| Perforated Panels Laser, Waterjet, Bending, Welding | Pacoima, CA | LaserWaterjetBendingWelding | - |
| Premier Steel Bending, Welding | Anaheim, CA | BendingWelding | - |
| Roncelli Plastics Inc Welding, Stamping, Assembly · ISO 9001, ITAR, ISO 13485, CMMC | Monrovia, CA | WeldingStampingAssembly | ISO 9001, ITAR, ISO 13485, CMMC |
| SOS Steel Co Inc Welding | Santa Clara, CA | Welding | - |
| Steel Werx Bending, Welding | Santa Clara, CA | BendingWelding | - |
| Weldtec Manufacturing, Inc Welding | Waterford, CA | Welding | - |
| Weldway Steel Fabrication Inc Turning, Bending, Welding | Oakdale, CA | TurningBendingWelding | - |
| A & A Fabrication and Polishing Corporation Milling, Turning, Laser, Punching, Bending, Welding · ISO 9001, AS9100 | Montebello, CA | MillingTurningLaserPunchingBendingWelding | ISO 9001, AS9100 |
| Angeles Precision Engineering LLC Milling, Turning, Assembly · ISO 9001, ITAR | Ontario, CA | MillingTurningAssembly | ISO 9001, ITAR |
| Antonio's Metal Works, Inc Welding | El Cajon, CA | Welding | - |
| Axis Product Development, Inc Milling · ITAR | Santa Ana, CA | Milling | ITAR |
| Bell Machine Works Milling, Finishing · ISO 9001, ITAR | Gilroy, CA | MillingFinishing | ISO 9001, ITAR |
| Beltim & Associates, LLC Milling, Turning, Swiss, Waterjet, Stamping, Casting, EDM, Finishing · ISO 9001, ITAR, ISO 13485 | Pleasanton, CA | MillingTurningSwissWaterjetStampingCastingEDMFinishing | ISO 9001, ITAR, ISO 13485 |
| Brian's Welding Welding | San Jose, CA | Welding | - |
| Cellpoint Systems, Inc Stamping, Assembly | Fremont, CA | StampingAssembly | - |
| Connelly Machine WKS Milling, Turning, Waterjet, Welding, Grinding · ISO 9001, ITAR | Santa Ana, CA | MillingTurningWaterjetWeldingGrinding | ISO 9001, ITAR |
| Delta Machine Company, LLC Milling, Turning, Welding, Grinding | Harbor City, CA | MillingTurningWeldingGrinding | - |
| Excel Machining Milling, Turning, Bending, Welding, Waterjet · ISO 9001 | Santa Clara, CA | MillingTurningBendingWeldingWaterjet | ISO 9001 |
| Hansens Welding Inc Waterjet, Welding | Gardena, CA | WaterjetWelding | - |
| Ipanel Systems Inc Milling | Santa Clarita, CA | Milling | - |
| Mikelson Machine Shop, Inc Milling, Turning | S El Monte, CA | MillingTurning | - |
| Stellar Engineering Milling, Turning · AS9100 | Anaheim, CA | MillingTurning | AS9100 |
| Tri Models Inc Milling, Turning, EDM, Finishing, Assembly | Huntington Beach, CA | MillingTurningEDMFinishingAssembly | - |
| Wess-Del Inc Milling, Waterjet, EDM, Assembly · ISO 9001, AS9100, ITAR, ISO 13485 | San Jose, CA | MillingWaterjetEDMAssembly | ISO 9001, AS9100, ITAR, ISO 13485 |
| All New Stamping Co Laser, Punching, Bending, Stamping, Grinding · ISO 9001, AS9100 | El Monte, CA | LaserPunchingBendingStampingGrinding | ISO 9001, AS9100 |
| B & D Precision Welding Milling, Turning, Welding, Grinding | Pomona, CA | MillingTurningWeldingGrinding | - |
| Britech Electropolishing Inc Welding, Finishing | Newark, CA | WeldingFinishing | - |