| Washington Machine Works Milling, Turning, Bending, Welding · ISO 9001 | Seattle, WA | MillingTurningBendingWelding | ISO 9001 |
| Barnes Welding Inc Turning, Bending, Welding | Waterville, WA | TurningBendingWelding | - |
| Everett Engineering Inc Milling, Turning, Welding | Everett, WA | MillingTurningWelding | - |
| Puget Sound Precision, Inc Turning, Swiss, Waterjet, Assembly | Bremerton, WA | TurningSwissWaterjetAssembly | - |
| US Aluminum Castings Milling, Turning, Casting, Grinding, Finishing, Assembly · ISO 9001, ITAR, NADCAP, IATF 16949 | Entiat, WA | MillingTurningCastingGrindingFinishingAssembly | ISO 9001, ITAR, NADCAP, IATF 16949 |
| 3DX Industries Inc Milling, Turning, Swiss, Metal AM, Finishing, Assembly | Ferndale, WA | MillingTurningSwissMetal AMFinishingAssembly | - |
| A-1 Precision, Inc Milling, Turning, Swiss, Grinding · ISO 9001 | Vancouver, WA | MillingTurningSwissGrinding | ISO 9001 |
| A&j Custom Metals LLC Milling, Turning, Bending, Welding, Grinding | Graham, WA | MillingTurningBendingWeldingGrinding | - |
| Asko Processing Inc Turning, Grinding, Finishing | Seattle, WA | TurningGrindingFinishing | - |
| Bent River Tech Milling, Turning, EDM, Grinding | Vancouver, WA | MillingTurningEDMGrinding | - |
| Bluewater Industries Inc Milling, Turning, Welding, Casting, Finishing | Moses Lake, WA | MillingTurningWeldingCastingFinishing | - |
| Cascade Precision, Inc Milling, Turning, Swiss, Finishing, Assembly · ISO 9001, ITAR | Mukilteo, WA | MillingTurningSwissFinishingAssembly | ISO 9001, ITAR |
| Component Products Corp Milling, Turning, Waterjet, Punching, Bending, Stamping, Assembly · AS9100, ITAR, CMMC | Mukilteo, WA | MillingTurningWaterjetPunchingBendingStampingAssembly | AS9100, ITAR, CMMC |
| Cyclefab, LLC Milling, Turning, Welding | Renton, WA | MillingTurningWelding | - |
| Diamond Machine Works, Inc. Milling, Turning · ISO 9001, AS9100 | Seattle, WA | MillingTurning | ISO 9001, AS9100 |
| Electro Erosion Specialties, Inc Milling, Turning, Laser, Welding, EDM, Grinding | Renton, WA | MillingTurningLaserWeldingEDMGrinding | - |
| Fabtech Precision Sheet Metal LLC Milling, Turning, Laser, Punching, Bending, Welding, Finishing, Assembly | Spokane Valley, WA | MillingTurningLaserPunchingBendingWeldingFinishingAssembly | - |
| Feryok & Clarkson Machine and Marine Milling, Turning, Laser, Welding, Waterjet | Seattle, WA | MillingTurningLaserWeldingWaterjet | - |
| Future Present Labs Milling, Turning, Laser, Welding, Waterjet, Metal AM | Seattle, WA | MillingTurningLaserWeldingWaterjetMetal AM | - |
| Gause Tool, Inc Turning, Welding, Grinding | Goldendale, WA | TurningWeldingGrinding | - |
| GMS Metal Works Inc Milling, Turning · NADCAP | Auburn, WA | MillingTurning | NADCAP |
| GN Manufacturing LLC Milling, Turning, Swiss | Granite Falls, WA | MillingTurningSwiss | - |
| Hardy Engineering & Manufacturing, Inc Milling, Turning, Welding, EDM · AS9100 | Auburn, WA | MillingTurningWeldingEDM | AS9100 |
| Hill Aerosystems Inc Milling, Turning, Waterjet, Punching, Bending, Welding, Stamping, EDM, Assembly · AS9100 | Enumclaw, WA | MillingTurningWaterjetPunchingBendingWeldingStampingEDMAssembly | AS9100 |
| Holz Enterprises, Inc Milling, Turning, Finishing · AS9100, ITAR | Bellingham, WA | MillingTurningFinishing | AS9100, ITAR |
| Honeycutt Manufacturing Inc Milling, Turning, Swiss, Stamping, Grinding, Finishing | Mukilteo, WA | MillingTurningSwissStampingGrindingFinishing | - |
| JJR Engineering & Fabrication Inc Milling, Turning, Bending, Welding, Stamping, Finishing, Assembly · ISO 9001, AS9100, NADCAP | Woodinville, WA | MillingTurningBendingWeldingStampingFinishingAssembly | ISO 9001, AS9100, NADCAP |
| Lakehouse Industries Milling, Turning, Finishing | Woodland, WA | MillingTurningFinishing | - |
| Lakota Industries Milling, Turning · AS9100, ITAR | Marysville, WA | MillingTurning | AS9100, ITAR |
| Machine Repair & Design Milling, Turning, Waterjet, Welding, Finishing, Assembly · AS9100 | Sumner, WA | MillingTurningWaterjetWeldingFinishingAssembly | AS9100 |
| Machine Tool Services Turning, Bending, EDM | Spokane, WA | TurningBendingEDM | - |
| Machinists Inc Milling, Turning, Laser, Welding, EDM, Grinding · ISO 9001, ITAR | Seattle, WA | MillingTurningLaserWeldingEDMGrinding | ISO 9001, ITAR |
| Mega Machine Shop Inc Milling, Turning, Welding | Tumwater, WA | MillingTurningWelding | - |
| Metals Fabrication Co Milling, Turning, Welding | Airway Heights, WA | MillingTurningWelding | - |
| Mico Welding & Machining, Inc Milling, Turning, Welding, Finishing | Nine Mile Falls, WA | MillingTurningWeldingFinishing | - |
| Modern Machine Milling, Turning, Bending, Welding, Stamping | Seattle, WA | MillingTurningBendingWeldingStamping | - |
| Multi-Axis Technologies LLC Milling, Turning | Kent, WA | MillingTurning | - |
| Naimor Inc Milling, Turning, Laser, Punching, Bending, Welding, Finishing, Assembly | Snohomish, WA | MillingTurningLaserPunchingBendingWeldingFinishingAssembly | - |
| Northway Mathers Inc Milling, Turning, Waterjet, Bending, Welding, Finishing | Mukilteo, WA | MillingTurningWaterjetBendingWeldingFinishing | - |
| Nu-Tech Machining Inc Milling, Turning · ITAR | Vancouver, WA | MillingTurning | ITAR |
| Onamac Industries, Inc Milling, Turning, Casting, Grinding · ISO 9001, AS9100 | Everett, WA | MillingTurningCastingGrinding | ISO 9001, AS9100 |
| Pacific Northwest Metal Fabricators Turning, Welding, Waterjet | Seattle, WA | TurningWeldingWaterjet | - |
| Proto Technologies Inc Milling, Turning, Waterjet, EDM · ISO 9001, AS9100, ITAR | Liberty Lake, WA | MillingTurningWaterjetEDM | ISO 9001, AS9100, ITAR |
| Prowse Manufacturing Group Inc Milling, Turning, Waterjet, Bending, Assembly · ISO 9001, ITAR, CMMC | Marysville, WA | MillingTurningWaterjetBendingAssembly | ISO 9001, ITAR, CMMC |
| 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 |
| Sarco Precision, Inc Milling, Turning · ISO 9001, AS9100, ITAR | Mount Vernon, WA | MillingTurning | ISO 9001, AS9100, ITAR |
| Shamrock Machining Inc Milling, Turning, Bending, Laser, Welding · ISO 9001 | Spokane Valley, WA | MillingTurningBendingLaserWelding | ISO 9001 |
| Sicom Industries USA LLC Milling, Turning, Waterjet · ISO 9001, AS9100, CMMC | Stanwood, WA | MillingTurningWaterjet | ISO 9001, AS9100, CMMC |
| Swiss Productions, Inc Milling, Turning, Assembly · ISO 9001 | Liberty Lake, WA | MillingTurningAssembly | ISO 9001 |