| West Engineering Co Inc Milling, Bending, Welding, EDM, Grinding, Assembly | Ashland, VA | MillingBendingWeldingEDMGrindingAssembly | - |
| Western Fabrication Center LLC Turning, Bending, Welding, Grinding · ISO 9001 | Kelso, WA | TurningBendingWeldingGrinding | ISO 9001 |
| Westwood Fabrication & Sheet Metal Bending, Laser, Welding | Dayton, OH | BendingLaserWelding | - |
| Bender Precision Machining Incorporated Milling, Turning | Keyport, NJ | MillingTurning | - |
| CalWest MFG Milling, Turning, Laser, Waterjet, Bending, Welding · ISO 9001, ITAR | Fontana, CA | MillingTurningLaserWaterjetBendingWelding | ISO 9001, ITAR |
| Midwest Industrial Metal Fabrication Inc Milling, Turning, Punching, Bending, Welding, Stamping, Finishing | Huntington, IN | MillingTurningPunchingBendingWeldingStampingFinishing | - |
| West Cobb Engineering Milling, Waterjet, Welding, Assembly · ISO 9001, AS9100 | Douglasville, GA | MillingWaterjetWeldingAssembly | ISO 9001, AS9100 |
| Westcoast Precision, Inc Milling, Turning, Assembly · ISO 9001, AS9100, ITAR | San Jose, CA | MillingTurningAssembly | ISO 9001, AS9100, ITAR |
| Western Industrial Machining Inc Milling, Laser, Welding, Assembly | Hampstead, MD | MillingLaserWeldingAssembly | - |
| Western Machine Works, LLC Milling, Welding | Portland, OR | MillingWelding | - |
| Western Precision Products Inc Milling, Turning, Swiss · AS9100 | Tualatin, OR | MillingTurningSwiss | AS9100 |
| Westside Machine, LLC Milling, Turning, Grinding | Preston, ID | MillingTurningGrinding | - |
| ISCO Manufacturing Solutions Milling, Turning, Waterjet, Bending, Welding, Grinding · ISO 9001, AS9100 | Bend, OR | MillingTurningWaterjetBendingWeldingGrinding | ISO 9001, AS9100 |
| Laserbend, LLC Laser, Bending, Welding, Finishing | Tujunga, CA | LaserBendingWeldingFinishing | - |
| Midwest Precision Inc Bending, Laser, Welding, Waterjet · ISO 9001 | Tulsa, OK | BendingLaserWeldingWaterjet | ISO 9001 |
| West Michigan Precision Machining Milling, Turning, Bending · ISO 9001, AS9100, ITAR | Walker, MI | MillingTurningBending | ISO 9001, AS9100, ITAR |
| CV International, Inc Milling, Turning, Laser, Punching, Bending, Welding · ISO 9001 | Bend, OR | MillingTurningLaserPunchingBendingWelding | ISO 9001 |
| Desert West CNC LLC Milling, Turning, Finishing | El Paso, TX | MillingTurningFinishing | - |
| High Star Corp Milling, Turning, Bending, Welding, Stamping, Grinding, Finishing · ISO 9001 | Westland, MI | MillingTurningBendingWeldingStampingGrindingFinishing | ISO 9001 |
| Hydrafab Northwest, Inc Laser, Bending, Welding | Spokane Valley, WA | LaserBendingWelding | - |
| Jack West CNC, Inc Milling, Turning, EDM | Chula Vista, CA | MillingTurningEDM | - |
| Jet Speed Metals Bending, Welding | Westbrook, ME | BendingWelding | - |
| Lehi Sheet Metal Turning, Laser, Punching, Bending, Welding, Grinding, Finishing · ISO 9001, AS9100, ITAR | Westborough, MA | TurningLaserPunchingBendingWeldingGrindingFinishing | ISO 9001, AS9100, ITAR |
| Midwest Precision LLC Milling, Turning, Casting, EDM, Grinding, Assembly · ISO 9001, ITAR | Eastlake, OH | MillingTurningCastingEDMGrindingAssembly | ISO 9001, ITAR |
| Midwest Tool Inc Milling, Turning, Welding, EDM, Grinding | Joplin, MO | MillingTurningWeldingEDMGrinding | - |
| Midwest Tool Inc. Milling, Bending, Welding | Chicago, IL | MillingBendingWelding | - |
| Northwest Steel Fab, Inc Milling, Punching, Bending, Welding | Deer Park, WA | MillingPunchingBendingWelding | - |
| Southwest Industrial Sales LLC Milling, Turning, Swiss, Bending, Welding, EDM, Assembly · ISO 9001, AS9100, ITAR, ISO 13485, CMMC | Chandler, AZ | MillingTurningSwissBendingWeldingEDMAssembly | ISO 9001, AS9100, ITAR, ISO 13485, CMMC |
| Southwest Waterjet and Laser Milling, Laser, Waterjet, Bending | Phoenix, AZ | MillingLaserWaterjetBending | - |
| United Western Industries Inc. Milling, Bending, Laser, Welding, Stamping · IATF 16949 | Fresno, CA | MillingBendingLaserWeldingStamping | IATF 16949 |
| Weisgram Metal Fab Bending, Laser, Welding · ISO 9001 | West Fargo, ND | BendingLaserWelding | ISO 9001 |
| West Michigan Fab Corp Milling, Laser | Belding, MI | MillingLaser | - |
| Western Metal Works Inc Milling, Waterjet, Welding | Albuquerque, NM | MillingWaterjetWelding | - |
| Compo Engineering LLC Welding, Finishing | Westport, CT | WeldingFinishing | - |
| Machinable Innovations LLC Milling, Turning | Bend, OR | MillingTurning | - |
| Midwest Metal Fabrications Milling, Turning, Bending, Laser, Welding · ISO 9001, AS9100 | Tallmadge, OH | MillingTurningBendingLaserWelding | ISO 9001, AS9100 |
| Midwest Steel Works Inc. Welding | Lincoln, NE | Welding | - |
| Millrite Machine Inc Turning, Assembly · ISO 9001 | Westfield, MA | TurningAssembly | ISO 9001 |
| Nortek, Inc Milling, Turning, Swiss, Laser, Waterjet, Welding, EDM, Grinding, Finishing · ISO 9001, AS9100, ITAR, NADCAP | West Springfield, MA | MillingTurningSwissLaserWaterjetWeldingEDMGrindingFinishing | ISO 9001, AS9100, ITAR, NADCAP |
| Super Web Digital, Inc Milling, Turning, Welding, Grinding | West Babylon, NY | MillingTurningWeldingGrinding | - |
| Walker West LLC Bending, Welding, Stamping, Assembly | Ontario, CA | BendingWeldingStampingAssembly | - |
| West Palm Machining and Welding Milling, Turning, Waterjet, Welding | Riviera Beach, FL | MillingTurningWaterjetWelding | - |
| Axion Labs Inc Milling, Turning, Finishing · ISO 9001, AS9100, ITAR, ISO 13485 | Westlake, OH | MillingTurningFinishing | ISO 9001, AS9100, ITAR, ISO 13485 |
| Bergeron Machine LLC Turning, Swiss · ISO 9001 | Westford, MA | TurningSwiss | ISO 9001 |
| Boulevard Machine & Gear, Inc Milling, Turning, Grinding · ISO 9001, AS9100, ITAR | Westfield, MA | MillingTurningGrinding | ISO 9001, AS9100, ITAR |
| Brinkman Precision, Inc Milling, Turning, Swiss, Laser, EDM, Grinding · ISO 9001, NADCAP | West Henrietta, NY | MillingTurningSwissLaserEDMGrinding | ISO 9001, NADCAP |
| Csi Manufacturing Inc Milling, Turning, Laser, Welding, Stamping, Finishing · ISO 9001 | Westborough, MA | MillingTurningLaserWeldingStampingFinishing | ISO 9001 |
| DRP Machine Milling, Turning, Grinding · ISO 9001 | West Valley City, UT | MillingTurningGrinding | ISO 9001 |
| Dualtron Manufacturing Milling, Laser, Punching, Welding, Finishing, Assembly | West Babylon, NY | MillingLaserPunchingWeldingFinishingAssembly | - |
| Electro Parts Inc Milling, Turning, Welding, EDM, Finishing, Assembly | West Berlin, NJ | MillingTurningWeldingEDMFinishingAssembly | - |