| Luke Manufacturing Co Casting, Finishing | Wadsworth, OH | CastingFinishing | - |
| Marion Manufacturing Milling, Turning, Welding, Stamping, EDM · AS9100 | West Terre Haute, IN | MillingTurningWeldingStampingEDM | AS9100 |
| Martin's Metal Fabrication & Welding, Inc Milling, Turning, Laser, Waterjet, Bending, Welding | Vacaville, CA | MillingTurningLaserWaterjetBendingWelding | - |
| Mechfi Designs LLC Milling, Turning, Finishing | Westminster, CO | MillingTurningFinishing | - |
| Menco LLC Welding, Assembly | Wallace, MI | WeldingAssembly | - |
| Metal Arts Machine Co. Milling · ISO 9001, AS9100, ITAR, NADCAP | Wichita, KS | Milling | ISO 9001, AS9100, ITAR, NADCAP |
| Metaltek International Corp Milling, Welding, Casting, Metal AM · NADCAP | Waukesha, WI | MillingWeldingCastingMetal AM | NADCAP |
| Michigan CNC Tool, Inc Milling, Turning, EDM, Grinding · ISO 9001 | Whitmore Lake, MI | MillingTurningEDMGrinding | ISO 9001 |
| Microwave Components Specialists, Inc Milling, Turning | Orleans, MA | MillingTurning | - |
| Midwest Machine & Tool, Inc Milling, Turning, Welding, EDM, Grinding, Finishing | Columbus, NE | MillingTurningWeldingEDMGrindingFinishing | - |
| Midwest Machining Solutions LLC Milling, Turning, Waterjet, Welding, Assembly | Saint Louis, MO | MillingTurningWaterjetWeldingAssembly | - |
| Midwest Precision Inc Bending, Laser, Welding, Waterjet · ISO 9001 | Tulsa, OK | BendingLaserWeldingWaterjet | ISO 9001 |
| Midwest Precision Machining Milling, Turning, Swiss, Grinding, Finishing · AS9100, NADCAP | Monticello, MN | MillingTurningSwissGrindingFinishing | AS9100, NADCAP |
| Midwest Tool Inc. Milling, Bending, Welding | Chicago, IL | MillingBendingWelding | - |
| Millrite Machine Inc Turning, Assembly · ISO 9001 | Westfield, MA | TurningAssembly | ISO 9001 |
| Modern Machine Works Milling, Turning, Welding, EDM, Grinding, Finishing | Albany, OR | MillingTurningWeldingEDMGrindingFinishing | - |
| Nelson Numeric, LLC Milling | Waterloo, WI | Milling | - |
| New Brunswick Plating Inc Milling, Casting, Finishing · ISO 9001, AS9100, NADCAP | New Brunswick, NJ | MillingCastingFinishing | ISO 9001, AS9100, NADCAP |
| New England Foundry LLC Milling, Bending, Welding, Stamping, Casting, EDM, Grinding, Finishing · ISO 9001 | Taunton, MA | MillingBendingWeldingStampingCastingEDMGrindingFinishing | ISO 9001 |
| New London Precision Instruments Inc Milling, Waterjet, EDM, Grinding, Finishing | New Market, MD | MillingWaterjetEDMGrindingFinishing | - |
| New Tech Metals Milling, Turning, Laser, Punching, Bending, Welding, Stamping, Finishing, Assembly · ISO 9001, AS9100, ITAR, IATF 16949, CMMC | Green Bay, WI | MillingTurningLaserPunchingBendingWeldingStampingFinishingAssembly | ISO 9001, AS9100, ITAR, IATF 16949, CMMC |
| Oem Fabricators Inc Milling, Turning, Laser, Welding, Assembly · ISO 9001 | Woodville, WI | MillingTurningLaserWeldingAssembly | ISO 9001 |
| Onium Machine and Fabrication, LLC Milling, Turning, Laser, Bending, Welding, Assembly · ISO 9001 | Winder, GA | MillingTurningLaserBendingWeldingAssembly | ISO 9001 |
| Oscar's Custom Iron Works Welding | San Antonio, TX | Welding | - |
| Paradorn, LLC Milling, Turning · ITAR | White Plains, MD | MillingTurning | ITAR |
| Peerless Precision Inc Milling, Turning, Welding, Grinding · ISO 9001, AS9100, ITAR | Westfield, MA | MillingTurningWeldingGrinding | ISO 9001, AS9100, ITAR |
| Pemco-Naval Engineering Works Inc Turning, Waterjet, Welding | Pascagoula, MS | TurningWaterjetWelding | - |
| Preci-Manufacturing, Incorporated Milling, Turning, Forging, EDM, Grinding, Assembly · ISO 9001, AS9100 | Winooski, VT | MillingTurningForgingEDMGrindingAssembly | ISO 9001, AS9100 |
| Precision Mold & Machining Services Inc Milling, EDM · ITAR | Warren, MI | MillingEDM | ITAR |
| Prematech, LLC Grinding | Worcester, MA | Grinding | - |
| Prime Machine Inc work Milling, Turning, Welding · AS9100, ISO 9001 | Salt Lake City, UT | MillingTurningWelding | AS9100, ISO 9001 |
| Production Screw Machine Co Milling, Turning, Bending, Welding · ISO 9001, AS9100, ITAR | Dayton, OH | MillingTurningBendingWelding | ISO 9001, AS9100, ITAR |
| Prototype & Production Co., Inc Milling, Turning, EDM, Grinding, Assembly · ISO 9001, ITAR | Wheeling, IL | MillingTurningEDMGrindingAssembly | ISO 9001, ITAR |
| R & W Machine & Tool Works Milling, Turning · ISO 9001 | Chicago, IL | MillingTurning | ISO 9001 |
| Rapid Machine Shop LLC Milling, Turning, Welding · ISO 9001 | Wichita, KS | MillingTurningWelding | ISO 9001 |
| Raptor Manufacturing LC Milling, Turning, Welding, Grinding · ISO 9001, AS9100, ITAR | Wichita, KS | MillingTurningWeldingGrinding | ISO 9001, AS9100, ITAR |
| Rimeco Products Inc Milling, Turning, EDM · AS9100, ITAR, NADCAP | Willoughby, OH | MillingTurningEDM | AS9100, ITAR, NADCAP |
| Robmar Precision, Inc Milling, Turning · ISO 9001, ITAR | Westland, MI | MillingTurning | ISO 9001, ITAR |
| Saliba Industries Milling, Turning, Grinding | Waukegan, IL | MillingTurningGrinding | - |
| Savannah Company, LLC Milling | Waunakee, WI | Milling | - |
| Schred Machine Company, Inc Milling, Turning · AS9100 | Warminster, PA | MillingTurning | AS9100 |
| Seconn Fabrication LLC Laser, Punching, Bending, Welding, Finishing | Waterford, CT | LaserPunchingBendingWeldingFinishing | - |
| Service Metal Fabricators Inc Milling, Punching, Bending, Welding, Stamping, Grinding, Finishing, Assembly | Williamsburg, VA | MillingPunchingBendingWeldingStampingGrindingFinishingAssembly | - |
| Southwest Precision Machining, L.L.C Milling, Turning, Swiss, Welding, Finishing | Tucson, AZ | MillingTurningSwissWeldingFinishing | - |
| Spokane Tin & Sheet Iron Works, Inc. Bending, Welding | Spokane, WA | BendingWelding | - |
| Spuncast Inc Casting · ISO 9001 | Watertown, WI | Casting | ISO 9001 |
| Standard Locknut, LLC Milling, Turning | Westfield, IN | MillingTurning | - |
| Steeltron Metal Works Bending, Welding | San Antonio, TX | BendingWelding | - |
| Swissomation Inc Milling · ISO 9001, ITAR | Fredericksburg, TX | Milling | ISO 9001, ITAR |
| Taylor EDM Specialties LLC Milling, EDM, Grinding | Wauconda, IL | MillingEDMGrinding | - |