| Rainier Metal Works Bending, Welding | Seattle, WA | BendingWelding | - |
| Redstone Manufacturing USA Milling, Bending, Laser, Welding, Stamping, Casting · ISO 9001, AS9100, IATF 16949 | Seattle, WA | MillingBendingLaserWeldingStampingCasting | ISO 9001, AS9100, IATF 16949 |
| Rentiel Precision Laser Cutting L.L.C Milling, Laser, Welding | Tacoma, WA | MillingLaserWelding | - |
| S & R Sheet Metal, Inc Laser, Punching, Bending, Welding, Finishing | Kelso, WA | LaserPunchingBendingWeldingFinishing | - |
| Seattle Makers Laser, Welding, Metal AM | Seattle, WA | LaserWeldingMetal AM | - |
| Shamrock Machining Inc Milling, Turning, Bending, Laser, Welding · ISO 9001 | Spokane Valley, WA | MillingTurningBendingLaserWelding | ISO 9001 |
| Spokane Metals Welding | Spokane Valley, WA | Welding | - |
| Spokane Tin & Sheet Iron Works, Inc. Bending, Welding | Spokane, WA | BendingWelding | - |
| Still Waters Metal Fab LLC Bending, Welding | Spokane Valley, WA | BendingWelding | - |
| Stork Precision Machining LLC Milling, Turning, Welding, EDM, Grinding · ISO 9001, CMMC | Washington, MO | MillingTurningWeldingEDMGrinding | ISO 9001, CMMC |
| Streich Bros Inc Milling, Welding | Tacoma, WA | MillingWelding | - |
| Takfab Precision Gunsmithing LLC Milling, Welding | Oak Harbor, WA | MillingWelding | - |
| Tech Heavy Industries, Inc Milling, Waterjet, Bending, Welding | Riverside, WA | MillingWaterjetBendingWelding | - |
| Three Sigma Manufacturing, Inc Milling, Turning, Welding, EDM, Grinding | Kent, WA | MillingTurningWeldingEDMGrinding | - |
| TMF Inc Milling, Turning, Welding, Finishing, Assembly · ISO 9001, AS9100, ITAR, NADCAP | Poulsbo, WA | MillingTurningWeldingFinishingAssembly | ISO 9001, AS9100, ITAR, NADCAP |
| Trufab LLC Milling, Turning, Welding | Shelton, WA | MillingTurningWelding | - |
| Western Fabrication Center LLC Turning, Bending, Welding, Grinding · ISO 9001 | Kelso, WA | TurningBendingWeldingGrinding | ISO 9001 |
| Wheeler Industries Inc Milling, Turning, Bending, Welding | Spokane Valley, WA | MillingTurningBendingWelding | - |
| Zigler's Welding Shop, Inc Welding | Tumwater, WA | Welding | - |
| Allied Industrial Machine Services Inc Milling, Turning, Welding, Grinding, Finishing | Falls Church, VA | MillingTurningWeldingGrindingFinishing | - |
| Blue Collar Metalworks Welding | Newport News, VA | Welding | - |
| Vulcan Engineering & Manf Milling, Turning, Laser, Punching, Bending, Welding, Grinding, Finishing | Waldorf, MD | MillingTurningLaserPunchingBendingWeldingGrindingFinishing | - |
| Winkler's Inc Welding | Baltimore, MD | Welding | - |