| Mac Origin Inc Milling | Bingen, WA | Milling | - |
| Machine Tool Services Turning, Bending, EDM | Spokane, WA | TurningBendingEDM | - |
| Medical Micro Machining Inc Milling | Colfax, WA | Milling | - |
| Metals Fabrication Co Milling, Turning, Welding | Airway Heights, WA | MillingTurningWelding | - |
| Metaltech Inc Laser, Bending, Welding, Assembly · AS9100 | Auburn, WA | LaserBendingWeldingAssembly | AS9100 |
| Mico Welding & Machining, Inc Milling, Turning, Welding, Finishing | Nine Mile Falls, WA | MillingTurningWeldingFinishing | - |
| Minter Industries LLC Milling · ISO 9001 | Lakewood, WA | Milling | ISO 9001 |
| MM Industries Tech LLC Laser, Punching, Bending, Welding, Assembly | Stanwood, WA | LaserPunchingBendingWeldingAssembly | - |
| Multi-Axis Technologies LLC Milling, Turning | Kent, WA | MillingTurning | - |
| Novation, Inc Finishing · ITAR, NADCAP | Spokane Vly, WA | Finishing | ITAR, NADCAP |
| Nu-Tech Machining Inc Milling, Turning · ITAR | Vancouver, WA | MillingTurning | ITAR |
| Pacific Architectural Metals LLC Bending, Laser, Welding | Seattle, WA | BendingLaserWelding | - |
| 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 | - |
| Roberts Precision Machine Inc Milling, Turning, Swiss · ISO 9001, AS9100, ISO 13485 | Monroe, WA | MillingTurningSwiss | ISO 9001, AS9100, ISO 13485 |
| RTC Aerospace Fife Division LLC Milling, Turning, Swiss, EDM, Assembly · AS9100 | Fife, WA | MillingTurningSwissEDMAssembly | AS9100 |
| S & R Sheet Metal, Inc Laser, Punching, Bending, Welding, Finishing | Kelso, WA | LaserPunchingBendingWeldingFinishing | - |
| Seattle Makers Laser, Welding, Metal AM | Seattle, WA | LaserWeldingMetal AM | - |
| Sicom Industries USA LLC Milling, Turning, Waterjet · ISO 9001, AS9100, CMMC | Stanwood, WA | MillingTurningWaterjet | ISO 9001, AS9100, CMMC |
| Spokane Metals Welding | Spokane Valley, WA | Welding | - |
| Still Waters Metal Fab LLC Bending, Welding | Spokane Valley, WA | BendingWelding | - |
| Swiss Productions, Inc Milling, Turning, Assembly · ISO 9001 | Liberty Lake, WA | MillingTurningAssembly | ISO 9001 |
| 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 | - |
| USWP Manufacturing Bending, Stamping, Finishing · AS9100, NADCAP | Spokane Valley, WA | BendingStampingFinishing | AS9100, NADCAP |
| Wheeler Industries Inc Milling, Turning, Bending, Welding | Spokane Valley, WA | MillingTurningBendingWelding | - |
| Zigler's Welding Shop, Inc Welding | Tumwater, WA | Welding | - |