| Metal Works Precision Machine and Tool, Inc Milling, Turning, Welding | Tucson, AZ | MillingTurningWelding | - |
| Metals Fabrication Co Milling, Turning, Welding | Airway Heights, WA | MillingTurningWelding | - |
| Metaltech CNC Machining LLC Milling, Turning, Bending | Portsmouth, RI | MillingTurningBending | - |
| Metzger Machine Co. Milling, Turning, Welding | Cincinnati, OH | MillingTurningWelding | - |
| Micar Fabrication Milling, Turning, Welding | Las Vegas, NV | MillingTurningWelding | - |
| Microform Precision LLC Turning, Bending, Laser, Welding, Waterjet | Sacramento, CA | TurningBendingLaserWeldingWaterjet | - |
| Micron Manufacturing Company Milling, Turning · ISO 9001 | Grand Rapids, MI | MillingTurning | ISO 9001 |
| Midlake Products & Mfg. Co., Inc Turning, Bending, Laser, Welding, Stamping | Canton, OH | TurningBendingLaserWeldingStamping | - |
| Midwest Metal Fabrications Milling, Turning, Bending, Laser, Welding · ISO 9001, AS9100 | Tallmadge, OH | MillingTurningBendingLaserWelding | ISO 9001, AS9100 |
| Miller Diversified Machining Milling, Turning, Welding · ISO 9001, ITAR | Minneapolis, MN | MillingTurningWelding | ISO 9001, ITAR |
| Modern Machine Milling, Turning, Bending, Welding, Stamping | Seattle, WA | MillingTurningBendingWeldingStamping | - |
| Moseys Production Machinists, Inc Milling, Turning · ISO 9001, AS9100, ITAR, NADCAP | Anaheim, CA | MillingTurning | ISO 9001, AS9100, ITAR, NADCAP |
| Moultrie Tool & Manufacturing Co Inc Milling, Turning, Bending, Welding, EDM, Stamping · ISO 9001 | Memphis, TN | MillingTurningBendingWeldingEDMStamping | ISO 9001 |
| Multi Machining Capabilities, Inc. Milling, Turning, EDM | Romulus, MI | MillingTurningEDM | - |
| New World Machining Inc Milling, Turning, Welding | San Jose, CA | MillingTurningWelding | - |
| Niagara Manufacturing Co Milling, Turning, Bending, Welding | Erie, PA | MillingTurningBendingWelding | - |
| OGS Industries Turning, Bending, Laser, Welding, Stamping · ISO 9001, AS9100, ITAR, IATF 16949 | Akron, OH | TurningBendingLaserWeldingStamping | ISO 9001, AS9100, ITAR, IATF 16949 |
| Ohio Metal Fabricating Inc Turning, Bending, Laser, Welding, Stamping · AS9100 | Dayton, OH | TurningBendingLaserWeldingStamping | AS9100 |
| Optima Precision Milling, Turning, Bending, Welding, EDM, Metal AM · ISO 9001, AS9100, ISO 13485, NADCAP | San Jose, CA | MillingTurningBendingWeldingEDMMetal AM | ISO 9001, AS9100, ISO 13485, NADCAP |
| Oregon Screw Machine Products Milling, Turning | Portland, OR | MillingTurning | - |
| Owens Industries, Inc. Milling, Turning, Welding, EDM, Casting, Metal AM · ISO 9001, AS9100 | Oak Creek, WI | MillingTurningWeldingEDMCastingMetal AM | ISO 9001, AS9100 |
| Pacific Northwest Metal Fabricators Turning, Welding, Waterjet | Seattle, WA | TurningWeldingWaterjet | - |
| Paramount Machine Turning, EDM · ISO 9001, AS9100, NADCAP | Manchester, CT | TurningEDM | ISO 9001, AS9100, NADCAP |
| Paramount Machine Milling, Turning, EDM · ISO 9001, AS9100, ITAR | Salt Lake City, UT | MillingTurningEDM | ISO 9001, AS9100, ITAR |
| Park Precision Machining Inc Milling, Turning | Minneapolis, MN | MillingTurning | - |
| Patience Metal Fab Turning, Bending, Welding | Brooklyn Center, MN | TurningBendingWelding | - |
| Pen Manufacturing Milling, Turning, Bending, Welding · ISO 9001, AS9100, ITAR, NADCAP | Anaheim, CA | MillingTurningBendingWelding | ISO 9001, AS9100, ITAR, NADCAP |
| Perry Screw Machine Company Milling, Turning, Bending | Erie, PA | MillingTurningBending | - |
| Perry Technology Corporation Milling, Turning, EDM · ISO 9001, AS9100, ITAR, NADCAP | New Hartford, CT | MillingTurningEDM | ISO 9001, AS9100, ITAR, NADCAP |
| PGI Milling, Turning, Bending, Laser, Welding, Waterjet, EDM · AS9100, ITAR | Albuquerque, NM | MillingTurningBendingLaserWeldingWaterjetEDM | AS9100, ITAR |
| PHES Machining Milling, Turning | Riverside, CA | MillingTurning | - |
| PNM Co Milling, Turning · ISO 9001 | Fresno, CA | MillingTurning | ISO 9001 |
| Portland Precision Manufacturing Milling, Turning · ISO 9001, AS9100, ITAR | Portland, OR | MillingTurning | ISO 9001, AS9100, ITAR |
| Precise Tool & Manufacturing Milling, Turning, Welding · ISO 9001, AS9100, ITAR | Rochester, NY | MillingTurningWelding | ISO 9001, AS9100, ITAR |
| Precision Machining & Fab Milling, Turning, Bending, Laser, Welding, Waterjet · ISO 9001, AS9100, ITAR | Anaheim, CA | MillingTurningBendingLaserWeldingWaterjet | ISO 9001, AS9100, ITAR |
| Prieto Machine Co Inc Milling, Turning, Bending, Welding, EDM · ISO 9001, AS9100 | Warminster, PA | MillingTurningBendingWeldingEDM | ISO 9001, AS9100 |
| Prime Machine Inc work Milling, Turning, Welding · AS9100, ISO 9001 | Salt Lake City, UT | MillingTurningWelding | AS9100, ISO 9001 |
| Priority Field Machining Services Milling, Turning, Bending, Welding | Corpus Christi, TX | MillingTurningBendingWelding | - |
| Pro Machine & Engineering Milling, Turning, Welding, EDM, Metal AM · ISO 9001, AS9100, ITAR | Colorado Springs, CO | MillingTurningWeldingEDMMetal AM | ISO 9001, AS9100, ITAR |
| Production Screw Machine Co Milling, Turning, Bending, Welding · ISO 9001, AS9100, ITAR | Dayton, OH | MillingTurningBendingWelding | ISO 9001, AS9100, ITAR |
| Professional Machining Inc Milling, Turning | Oklahoma City, OK | MillingTurning | - |
| Pronto Manufacturing Milling, Turning, EDM, Stamping | Ronkonkoma, NY | MillingTurningEDMStamping | - |
| Prototek Milling, Turning, Bending, Laser, Welding, Waterjet, EDM, Casting, Metal AM · ISO 9001, AS9100, ITAR, CMMC | Rancho Cordova, CA | MillingTurningBendingLaserWeldingWaterjetEDMCastingMetal AM | ISO 9001, AS9100, ITAR, CMMC |
| QTA Machining Milling, Turning, EDM · ISO 9001 | Buffalo, NY | MillingTurningEDM | ISO 9001 |
| Quake Manufacturing Inc Milling, Turning, Welding | Fort Wayne, IN | MillingTurningWelding | - |
| Quality Products, LLC Milling, Turning, Bending, Laser, Welding · ISO 9001, ITAR | Charlotte, NC | MillingTurningBendingLaserWelding | ISO 9001, ITAR |
| Quick Turn Precision Machining Milling, Turning, Welding · ISO 9001 | Ogden, UT | MillingTurningWelding | ISO 9001 |
| R & R Manufacturing Milling, Turning, Welding, Waterjet | Hillsboro, OR | MillingTurningWeldingWaterjet | - |
| R & W Machine & Tool Works Milling, Turning · ISO 9001 | Chicago, IL | MillingTurning | ISO 9001 |
| Radford Manufacturing Inc. Milling, Turning · ISO 9001, AS9100 | Fort Worth, TX | MillingTurning | ISO 9001, AS9100 |