| Stellar Engineering Milling, Turning · AS9100 | Anaheim, CA | MillingTurning | AS9100 |
| T&K Machine Milling, Turning, Welding, EDM, Grinding | Livermore, CA | MillingTurningWeldingEDMGrinding | - |
| TBT Machining Milling | Fremont, CA | Milling | - |
| TDC Manufacturing Inc Milling, Turning, Laser | Redlands, CA | MillingTurningLaser | - |
| TTN Machining, Inc Milling, Turning | Spring Valley, CA | MillingTurning | - |
| Van's Manufacturing, Inc Milling, Turning | Simi Valley, CA | MillingTurning | - |
| Vinatech Engineering Inc Milling, Laser, Bending, Welding, Assembly · ITAR | San Diego, CA | MillingLaserBendingWeldingAssembly | ITAR |
| Weldtec Manufacturing, Inc Welding | Waterford, CA | Welding | - |
| Wieland Techni-Cast Milling, Casting | South Gate, CA | MillingCasting | - |
| Brian's Welding Welding | San Jose, CA | Welding | - |
| Elite Machining & Engineering Services LLC Milling, EDM | Yorba Linda, CA | MillingEDM | - |
| G2 Metal Fab Bending, Welding | Stockton, CA | BendingWelding | - |
| LT CNC Machining Inc. Milling, Turning, Welding · AS9100 | San Diego, CA | MillingTurningWelding | AS9100 |
| Advance Virtu CNC Milling, Turning | Glendale, CA | MillingTurning | - |
| American CNC Inc Milling, Turning · AS9100 | Pacoima, CA | MillingTurning | AS9100 |
| General Industrial Repair Milling, Turning, Welding, Grinding | Montebello, CA | MillingTurningWeldingGrinding | - |
| Machina Labs Inc Stamping · ITAR, CMMC | Chatsworth, CA | Stamping | ITAR, CMMC |
| TM Industries Inc Milling, Welding | Santa Clara, CA | MillingWelding | - |
| TQ Systems Inc Milling, Turning, EDM, Assembly | Lake Forest, CA | MillingTurningEDMAssembly | - |
| United Western Industries Inc. Milling, Bending, Laser, Welding, Stamping · IATF 16949 | Fresno, CA | MillingBendingLaserWeldingStamping | IATF 16949 |