| HK Manufacturing Services LLC Milling | Everett, WA | Milling | - |
| Hobart Machined Products Inc Welding, Assembly | Maple Valley, WA | WeldingAssembly | - |
| Holz Enterprises, Inc Milling, Turning, Finishing · AS9100, ITAR | Bellingham, WA | MillingTurningFinishing | AS9100, ITAR |
| Lakota Industries Milling, Turning · AS9100, ITAR | Marysville, WA | MillingTurning | AS9100, ITAR |
| Mac Origin Inc Milling | Bingen, WA | Milling | - |
| Medical Micro Machining Inc Milling | Colfax, WA | Milling | - |
| Modern Machine Milling, Turning, Bending, Welding, Stamping | Seattle, WA | MillingTurningBendingWeldingStamping | - |
| Novo Modo Machining Milling · ISO 9001, AS9100, ITAR, CMMC | Mount Vernon, WA | Milling | ISO 9001, AS9100, ITAR, CMMC |
| Onamac Industries, Inc Milling, Turning, Casting, Grinding · ISO 9001, AS9100 | Everett, WA | MillingTurningCastingGrinding | ISO 9001, AS9100 |
| Sarco Precision, Inc Milling, Turning · ISO 9001, AS9100, ITAR | Mount Vernon, WA | MillingTurning | ISO 9001, AS9100, ITAR |
| Toolcraft Inc Milling, Turning · ISO 9001, ITAR | Monroe, WA | MillingTurning | ISO 9001, ITAR |
| Xtreme Machining, Inc Milling, Turning · ISO 9001, AS9100 | Auburn, WA | MillingTurning | ISO 9001, AS9100 |