| Colorado Machine Works, Inc. Milling, Turning | Colorado Springs, CO | MillingTurning | - |
| Compo Engineering LLC Welding, Finishing | Westport, CT | WeldingFinishing | - |
| Criterion Manufacturing Turning, Welding | Waterloo, IA | TurningWelding | - |
| Critical Defense Inc Milling, Turning, Bending, Welding, Grinding, Assembly | Windber, PA | MillingTurningBendingWeldingGrindingAssembly | - |
| Csi Manufacturing Inc Milling, Turning, Laser, Welding, Stamping, Finishing · ISO 9001 | Westborough, MA | MillingTurningLaserWeldingStampingFinishing | ISO 9001 |
| Custom Machine Works LLC Milling, Turning, Stamping, Grinding | Fenton, MO | MillingTurningStampingGrinding | - |
| Dan's Custom Machining LLC Milling, Turning, Welding | Williamsburg, OH | MillingTurningWelding | - |
| Davis Manufacturing Co Milling, Turning, Welding, Finishing · AS9100, ITAR, CMMC | Wheat Ridge, CO | MillingTurningWeldingFinishing | AS9100, ITAR, CMMC |
| Diamond Machine Works, Inc. Milling, Turning · ISO 9001, AS9100 | Seattle, WA | MillingTurning | ISO 9001, AS9100 |
| Dimensional Swiss Products, Inc Milling, Turning, Swiss · ISO 9001 | Huntingdon, TN | MillingTurningSwiss | ISO 9001 |
| DJW Assembly Inc Milling, Turning | Arlington Heights, IL | MillingTurning | - |
| Dream Works Metal Bending, Welding | Sacramento, CA | BendingWelding | - |
| Dualtron Manufacturing Milling, Laser, Punching, Welding, Finishing, Assembly | West Babylon, NY | MillingLaserPunchingWeldingFinishingAssembly | - |
| Dunham Products, Inc Milling, Turning, Swiss, Grinding, Finishing · ISO 9001 | Walton Hills, OH | MillingTurningSwissGrindingFinishing | ISO 9001 |
| Dynamic Engineering Inc Milling, Turning, Laser, Waterjet, Welding, EDM, Grinding, Finishing | Watertown, SD | MillingTurningLaserWaterjetWeldingEDMGrindingFinishing | - |
| Dynomax Inc EDM, Finishing, Assembly · ISO 9001, AS9100, ITAR | Wheeling, IL | EDMFinishingAssembly | ISO 9001, AS9100, ITAR |
| Ebway LLC Milling, Stamping, EDM, Grinding · ISO 9001 | Fort Lauderdale, FL | MillingStampingEDMGrinding | ISO 9001 |
| Edge Machine Works Inc Milling | Hatboro, PA | Milling | - |
| Emb Machining Services Inc Milling, Turning, Bending, Welding, Grinding, Assembly · ISO 9001, ITAR | Whitney, PA | MillingTurningBendingWeldingGrindingAssembly | ISO 9001, ITAR |
| Engineered Fabrication, Inc Milling, Turning, Laser, Waterjet, Bending, Welding, Finishing · ISO 9001 | Watkinsville, GA | MillingTurningLaserWaterjetBendingWeldingFinishing | ISO 9001 |
| Ewart-Ohlson Machine Company Milling, Turning, Bending · ISO 9001, AS9100 | Cuyahoga Falls, OH | MillingTurningBending | ISO 9001, AS9100 |
| Fabriweld Corp Milling, Turning, Laser, Welding, Finishing | Norwalk, OH | MillingTurningLaserWeldingFinishing | - |
| Fairchild Precision Parts Milling, Turning, Swiss, Stamping, Grinding, Finishing · ISO 9001, AS9100, ITAR | Winsted, CT | MillingTurningSwissStampingGrindingFinishing | ISO 9001, AS9100, ITAR |
| Fairview Machine Co Inc Milling, Turning, EDM, Assembly | Topsfield, MA | MillingTurningEDMAssembly | - |
| FDM of Clearwater Inc Milling, Turning, EDM, Grinding | Largo, FL | MillingTurningEDMGrinding | - |
| Glpc Fab, LLC Laser, Punching, Bending, Welding, Finishing, Assembly | Walled Lake, MI | LaserPunchingBendingWeldingFinishingAssembly | - |
| GMS Metal Works Inc Milling, Turning · NADCAP | Auburn, WA | MillingTurning | NADCAP |
| Goodwin-Bradley Pattern Co Inc Milling, Casting · ISO 9001, AS9100 | Providence, RI | MillingCasting | ISO 9001, AS9100 |
| Grovtec US Inc Milling, Turning, Swiss, Finishing · ISO 9001, AS9100, ITAR | Wood Village, OR | MillingTurningSwissFinishing | ISO 9001, AS9100, ITAR |
| Hawk Welding & Fabrication Welding | Fort Worth, TX | Welding | - |
| Hawkeye Innovation LLC Milling, Grinding, Assembly · ISO 9001, AS9100, ITAR | Agawam, MA | MillingGrindingAssembly | ISO 9001, AS9100, ITAR |
| Helix Metalworks Turning, Welding | Tulsa, OK | TurningWelding | - |
| Herold Precision Metals, LLC Milling, Laser, Punching, Bending, Welding, Stamping, Finishing, Assembly · ISO 9001, ITAR | White Bear Lake, MN | MillingLaserPunchingBendingWeldingStampingFinishingAssembly | ISO 9001, ITAR |
| High Star Corp Milling, Turning, Bending, Welding, Stamping, Grinding, Finishing · ISO 9001 | Westland, MI | MillingTurningBendingWeldingStampingGrindingFinishing | ISO 9001 |
| Howard Tool Co Milling, Turning | Hermon, ME | MillingTurning | - |
| Hybrid CNC Parts Welding, Metal AM · ISO 9001, AS9100, CMMC | Worcester, MA | WeldingMetal AM | ISO 9001, AS9100, CMMC |
| Industrial Motions Engineering, Inc Milling, Turning, Welding, Grinding, Finishing, Assembly | Wilmington, MA | MillingTurningWeldingGrindingFinishingAssembly | - |
| Iridium Manufacturing Milling, Turning, Waterjet, EDM, Grinding · ISO 9001 | Washington, MI | MillingTurningWaterjetEDMGrinding | ISO 9001 |
| J & R Machine Works Milling, Turning · ISO 9001, AS9100 | Lancaster, CA | MillingTurning | ISO 9001, AS9100 |
| J A-Co Machine Works, LLC Milling, Turning, Swiss, Welding, Finishing, Assembly · ISO 9001, AS9100, ITAR, NADCAP, ISO 13485 | Scotts Valley, CA | MillingTurningSwissWeldingFinishingAssembly | ISO 9001, AS9100, ITAR, NADCAP, ISO 13485 |
| Jack West CNC, Inc Milling, Turning, EDM | Chula Vista, CA | MillingTurningEDM | - |
| Jem Custom Products, Inc Milling, Finishing | Wauconda, IL | MillingFinishing | - |
| Jet Machine Works, Inc Milling, Turning | Houston, TX | MillingTurning | - |
| Jkeys LLC Laser, Bending, Finishing | Willis, TX | LaserBendingFinishing | - |
| Keeler Iron Works Welding | Memphis, TN | Welding | - |
| KLW Manufacturing & Design, Inc Milling, Assembly | Arlington, WA | MillingAssembly | - |
| Lai International Inc Milling, Laser, Waterjet, Welding, Metal AM, EDM, Finishing · NADCAP | Westminster, MD | MillingLaserWaterjetWeldingMetal AMEDMFinishing | NADCAP |
| Lakehouse Industries Milling, Turning, Finishing | Woodland, WA | MillingTurningFinishing | - |
| Lakeview Forge Co Forging · ITAR | Erie, PA | Forging | ITAR |
| Land Sea Air Manufacturing Inc Milling, Turning, Waterjet, Assembly | Westminster, MD | MillingTurningWaterjetAssembly | - |