| Ward's Manufacturing LLC Laser, Bending, Welding, Finishing | Warren, RI | LaserBendingWeldingFinishing | - |
| Warren Precision Milling, Turning, Swiss, Grinding | Warren, OH | MillingTurningSwissGrinding | - |
| Weisgram Metal Fab Bending, Laser, Welding · ISO 9001 | West Fargo, ND | BendingLaserWelding | ISO 9001 |
| Weldtec Manufacturing, Inc Welding | Waterford, CA | Welding | - |
| Wirefab Inc. Bending, Laser, Welding · ISO 9001 | Worcester, MA | BendingLaserWelding | ISO 9001 |
| Waltz Brothers, Inc Turning, Grinding · ISO 9001 | Wheeling, IL | TurningGrinding | ISO 9001 |
| Wichita Machine Products Inc Milling, Turning, Grinding, Assembly | Wichita, KS | MillingTurningGrindingAssembly | - |
| American Waterjet Cutting LLC Milling, Waterjet, Finishing | Winfield, IA | MillingWaterjetFinishing | - |
| Barnes Welding Inc Turning, Bending, Welding | Waterville, WA | TurningBendingWelding | - |
| Carver Machine Works Inc Waterjet, Welding, Assembly · ISO 9001, AS9100, NADCAP | Washington, NC | WaterjetWeldingAssembly | ISO 9001, AS9100, NADCAP |
| Griffin Welding LLC Welding | Waterbury, CT | Welding | - |
| Midway Swiss Turn, Inc Milling, Turning, Swiss, Finishing, Assembly · CMMC | Wooster, OH | MillingTurningSwissFinishingAssembly | CMMC |
| Moll Machine Works, LLC Milling, Turning, Welding | Williamson, NY | MillingTurningWelding | - |
| Motion Metalworks LLC Laser, Waterjet, Bending, Welding, Finishing | Wrens, GA | LaserWaterjetBendingWeldingFinishing | - |
| Neway Stamping & Manufacturing, Inc Laser, Stamping, Finishing | Willoughby, OH | LaserStampingFinishing | - |
| Super Web Digital, Inc Milling, Turning, Welding, Grinding | West Babylon, NY | MillingTurningWeldingGrinding | - |
| Two M Precision Co. Inc Milling, Grinding, Finishing · ISO 9001 | Willoughby, OH | MillingGrindingFinishing | ISO 9001 |
| US Tower Corp Milling, Welding, Assembly · ISO 9001 | Woodlake, CA | MillingWeldingAssembly | ISO 9001 |
| West Michigan Precision Machining Milling, Turning, Bending · ISO 9001, AS9100, ITAR | Walker, MI | MillingTurningBending | ISO 9001, AS9100, ITAR |
| Bowden Manufacturing Corp Milling, Turning, EDM · AS9100 | Willoughby, OH | MillingTurningEDM | AS9100 |
| Delaware Metals Milling, Turning, EDM | Wilmington, DE | MillingTurningEDM | - |
| Frey & Weiss Precision Machining Inc Milling, Turning, Grinding, Assembly · ISO 9001 | Wood Dale, IL | MillingTurningGrindingAssembly | ISO 9001 |
| Tidewater Machine Co Milling, Turning, EDM | White Plains, MD | MillingTurningEDM | - |
| Accuburn of Williamsport, Inc Milling, Laser, Bending, Welding, Assembly | Williamsport, IN | MillingLaserBendingWeldingAssembly | - |
| Digitrace Machine Works Ltd Milling, Welding, Stamping, Finishing | Wayland, MI | MillingWeldingStampingFinishing | - |
| Sinclair and Sons Custom Welding and Machining Service Inc Milling, Turning, Waterjet, Welding, Assembly · ISO 9001, AS9100, NADCAP | Wichita, KS | MillingTurningWaterjetWeldingAssembly | ISO 9001, AS9100, NADCAP |
| W & W Machine Co Inc Milling, Turning, Swiss, Welding, EDM, Finishing | Milford, CT | MillingTurningSwissWeldingEDMFinishing | - |
| W.C. Machine and Tool, Inc Milling, Waterjet, Punching, Welding, EDM, Grinding, Assembly | Chandler, AZ | MillingWaterjetPunchingWeldingEDMGrindingAssembly | - |
| Wackels Machine Shop LLC Welding | Crete, NE | Welding | - |
| Wagler Competition Products LLC Waterjet, Grinding | Odon, IN | WaterjetGrinding | - |
| Wagner Machine Company Milling, Turning, Swiss, Waterjet, Metal AM, EDM | Champaign, IL | MillingTurningSwissWaterjetMetal AMEDM | - |
| Wal-Tek Industries, Inc Milling, Turning, Laser, Welding, Finishing, Assembly · ISO 9001, AS9100, ITAR | Phoenix, AZ | MillingTurningLaserWeldingFinishingAssembly | ISO 9001, AS9100, ITAR |
| Walco Tool & Engineering Corp Milling, Turning, Welding, Grinding, Finishing · ISO 9001 | Romeoville, IL | MillingTurningWeldingGrindingFinishing | ISO 9001 |
| Walker West LLC Bending, Welding, Stamping, Assembly | Ontario, CA | BendingWeldingStampingAssembly | - |
| Wallabys Fabrications LLC Punching, Bending, Welding, Finishing | Fort Pierce, FL | PunchingBendingWeldingFinishing | - |
| Walt Machine Inc Milling, Swiss, Welding | Lumberton, MS | MillingSwissWelding | - |
| Warner Bros, Foundry Co Welding, Casting | Roseville, MI | WeldingCasting | - |
| Washington Machine Works Milling, Turning, Bending, Welding · ISO 9001 | Seattle, WA | MillingTurningBendingWelding | ISO 9001 |
| Waterjet Cutting Inc Turning, Waterjet, Bending, Welding · ITAR | Albuquerque, NM | TurningWaterjetBendingWelding | ITAR |
| Waukesha Metal Products Welding, Stamping, Finishing · ISO 9001, AS9100, ITAR, IATF 16949, CMMC | Sussex, WI | WeldingStampingFinishing | ISO 9001, AS9100, ITAR, IATF 16949, CMMC |
| Wayne Integrated Technologies Corp Milling, Bending, Welding, Assembly · ISO 9001, AS9100 | Edgewood, NY | MillingBendingWeldingAssembly | ISO 9001, AS9100 |
| Weiss Sheet Metal Laser, Waterjet, Punching, Welding | Avon, MA | LaserWaterjetPunchingWelding | - |
| Weistec Engineering, Inc Milling, Turning, Laser, Waterjet, Bending, Welding · ISO 9001, AS9100, ITAR | Anaheim, CA | MillingTurningLaserWaterjetBendingWelding | ISO 9001, AS9100, ITAR |
| Weld Craft Welding | Loveland, CO | Welding | - |
| Weld Kraft Milling, Bending, Welding, Waterjet · ISO 9001 | St Louis Park, MN | MillingBendingWeldingWaterjet | ISO 9001 |
| Weld Pro Bending, Welding, Waterjet | Boise, ID | BendingWeldingWaterjet | - |
| Weldcraft Products Milling, Welding, Grinding | Tipp City, OH | MillingWeldingGrinding | - |
| Weldway Steel Fabrication Inc Turning, Bending, Welding | Oakdale, CA | TurningBendingWelding | - |
| Well Bilt Power Systems LLC Milling, Turning, Welding, Stamping | Union, NJ | MillingTurningWeldingStamping | - |
| Wells Technology, Inc Milling, Turning, Swiss, Finishing · ISO 9001, NADCAP, ISO 13485 | Bemidji, MN | MillingTurningSwissFinishing | ISO 9001, NADCAP, ISO 13485 |