| Designed With Sparks LLC Welding | Usk, WA | Welding | - |
| RTC Aerospace Fife Division LLC Milling, Turning, Swiss, EDM, Assembly · AS9100 | Fife, WA | MillingTurningSwissEDMAssembly | AS9100 |
| TNT Machining LLC Milling, Turning, Grinding, Finishing | Sumas, WA | MillingTurningGrindingFinishing | - |
| Abw Technologies, Inc Milling, Welding · ISO 9001, AS9100 | Arlington, WA | MillingWelding | ISO 9001, AS9100 |
| Capital Industries Inc Laser, Punching, Bending, Welding, Finishing · ISO 9001 | Seattle, WA | LaserPunchingBendingWeldingFinishing | ISO 9001 |
| Cobalt Enterprises LLC Milling, Finishing · ITAR | Arlington, WA | MillingFinishing | ITAR |
| Component Products Corp Milling, Turning, Waterjet, Punching, Bending, Stamping, Assembly · AS9100, ITAR, CMMC | Mukilteo, WA | MillingTurningWaterjetPunchingBendingStampingAssembly | AS9100, ITAR, CMMC |
| Hill Aerosystems Inc Milling, Turning, Waterjet, Punching, Bending, Welding, Stamping, EDM, Assembly · AS9100 | Enumclaw, WA | MillingTurningWaterjetPunchingBendingWeldingStampingEDMAssembly | AS9100 |
| Hydrafab Northwest, Inc Laser, Bending, Welding | Spokane Valley, WA | LaserBendingWelding | - |
| J Newell Corp Milling, Welding | Arlington, WA | MillingWelding | - |
| JJR Engineering & Fabrication Inc Milling, Turning, Bending, Welding, Stamping, Finishing, Assembly · ISO 9001, AS9100, NADCAP | Woodinville, WA | MillingTurningBendingWeldingStampingFinishingAssembly | ISO 9001, AS9100, NADCAP |
| Lakota Industries Milling, Turning · AS9100, ITAR | Marysville, WA | MillingTurning | AS9100, ITAR |
| Metaltech Inc Laser, Bending, Welding, Assembly · AS9100 | Auburn, WA | LaserBendingWeldingAssembly | AS9100 |
| Onamac Industries, Inc Milling, Turning, Casting, Grinding · ISO 9001, AS9100 | Everett, WA | MillingTurningCastingGrinding | ISO 9001, AS9100 |
| Prowse Manufacturing Group Inc Milling, Turning, Waterjet, Bending, Assembly · ISO 9001, ITAR, CMMC | Marysville, WA | MillingTurningWaterjetBendingAssembly | ISO 9001, ITAR, CMMC |
| 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 |
| Tech Heavy Industries, Inc Milling, Waterjet, Bending, Welding | Riverside, WA | MillingWaterjetBendingWelding | - |
| Techcraft Precision Milling, Finishing · AS9100, ITAR, CMMC | Bellingham, WA | MillingFinishing | AS9100, ITAR, CMMC |
| Xtreme Machining, Inc Milling, Turning · ISO 9001, AS9100 | Auburn, WA | MillingTurning | ISO 9001, AS9100 |
| Yakima Machine Milling, Turning, Finishing | Yakima, WA | MillingTurningFinishing | - |