| Mountain Valley Machine, Inc Milling, Turning, Waterjet, Bending, Welding, EDM, Grinding · ISO 9001 | Smithfield, UT | MillingTurningWaterjetBendingWeldingEDMGrinding | ISO 9001 |
| Mountain View Machine and Welding Milling, Turning, Waterjet, Welding, EDM | Logan, UT | MillingTurningWaterjetWeldingEDM | - |
| Multi Machining Capabilities, Inc. Milling, Turning, EDM | Romulus, MI | MillingTurningEDM | - |
| O & Y Precision Inc Milling, Laser, Waterjet, Bending, Welding, EDM, Finishing, Assembly | Morgan Hill, CA | MillingLaserWaterjetBendingWeldingEDMFinishingAssembly | - |
| O. W. Landergren, Inc Milling, Laser, Punching, Bending, Welding, Stamping, EDM, Grinding, Finishing | Pittsfield, MA | MillingLaserPunchingBendingWeldingStampingEDMGrindingFinishing | - |
| O&R Precision Milling, Turning, Swiss, Stamping, EDM, Grinding · ISO 9001 | Berne, IN | MillingTurningSwissStampingEDMGrinding | ISO 9001 |
| Ofallon Casting LLC Casting, EDM | O Fallon, MO | CastingEDM | - |
| Omni Machine Works Inc Milling, Turning, Welding, EDM, Grinding | Covington, GA | MillingTurningWeldingEDMGrinding | - |
| Owens Industries, Inc. Milling, Turning, Welding, EDM, Casting, Metal AM · ISO 9001, AS9100 | Oak Creek, WI | MillingTurningWeldingEDMCastingMetal AM | ISO 9001, AS9100 |
| P & N Machine Co, Inc Milling, Turning, Swiss, Laser, Welding, EDM, Finishing · ISO 9001, ITAR, ISO 13485 | Houston, TX | MillingTurningSwissLaserWeldingEDMFinishing | ISO 9001, ITAR, ISO 13485 |
| P3D Creations LLC Milling, Turning, Welding, EDM, Grinding, Finishing · ITAR, CMMC | Maitland, FL | MillingTurningWeldingEDMGrindingFinishing | ITAR, CMMC |
| Painter Tool Incorporated Milling, Turning, Welding, EDM | Irwin, PA | MillingTurningWeldingEDM | - |
| Palmetto Precision Machining, Inc Milling, Welding, EDM, Grinding · ISO 9001 | Anderson, SC | MillingWeldingEDMGrinding | ISO 9001 |
| Paradigm Industrial Milling, Turning, Waterjet, Bending, Welding, EDM, Grinding, Assembly · ISO 9001, ITAR, CMMC | Dayton, OH | MillingTurningWaterjetBendingWeldingEDMGrindingAssembly | ISO 9001, ITAR, CMMC |
| Paramount Machine Milling, Turning, EDM · ISO 9001, AS9100, ITAR | Salt Lake City, UT | MillingTurningEDM | ISO 9001, AS9100, ITAR |
| Pathway Precision Manufacturing LLC Milling, Turning, Swiss, Laser, Welding, EDM, Grinding, Finishing · ITAR, ISO 13485, CMMC | Memphis, TN | MillingTurningSwissLaserWeldingEDMGrindingFinishing | ITAR, ISO 13485, CMMC |
| Peko Precision Products Inc Welding, EDM, Finishing, Assembly · ISO 9001, ITAR, ISO 13485, CMMC | Rochester, NY | WeldingEDMFinishingAssembly | ISO 9001, ITAR, ISO 13485, CMMC |
| Pennco Tool & Die, Inc Milling, Turning, Welding, Stamping, EDM, Grinding, Finishing · ISO 9001, CMMC | Meadville, PA | MillingTurningWeldingStampingEDMGrindingFinishing | ISO 9001, CMMC |
| Petersen Precision Engineering LLC Milling, Turning, Swiss, EDM, Grinding, Finishing · ISO 9001, AS9100, ISO 13485 | Redwood City, CA | MillingTurningSwissEDMGrindingFinishing | ISO 9001, AS9100, ISO 13485 |
| PHD Machining LLC Milling, EDM, Assembly | Santa Clara, CA | MillingEDMAssembly | - |
| PJF Engineered Solutions, Inc Milling, Welding, Metal AM, EDM, Grinding, Finishing · ISO 9001, ITAR | Rockford, MI | MillingWeldingMetal AMEDMGrindingFinishing | ISO 9001, ITAR |
| Pleasanton Tool & Manufacturing Inc Milling, Turning, Welding, EDM · ITAR | Pleasanton, CA | MillingTurningWeldingEDM | ITAR |
| Plouse Machine Shop, Inc Milling, Turning, EDM, Grinding, Assembly · ISO 9001 | Highspire, PA | MillingTurningEDMGrindingAssembly | ISO 9001 |
| Pol-Tech Machining, LLC Milling, Turning, Laser, Punching, Bending, Welding, EDM, Finishing · ISO 9001 | Woodruff, SC | MillingTurningLaserPunchingBendingWeldingEDMFinishing | ISO 9001 |
| Polaris Engineering Inc Milling, Turning, Welding, EDM, Grinding | Fraser, MI | MillingTurningWeldingEDMGrinding | - |
| Pompano Precision Products Milling, Turning, Swiss, Welding, EDM, Grinding, Finishing · ISO 9001, ITAR, ISO 13485 | Pompano Beach, FL | MillingTurningSwissWeldingEDMGrindingFinishing | ISO 9001, ITAR, ISO 13485 |
| Precision Cutter & Tool Co Milling, Turning, Stamping, EDM, Grinding · ISO 9001 | Lebanon, MO | MillingTurningStampingEDMGrinding | ISO 9001 |
| Precision Defense Services Inc Milling, Turning, Waterjet, Welding, EDM, Grinding, Finishing · ISO 9001, AS9100 | Irwin, PA | MillingTurningWaterjetWeldingEDMGrindingFinishing | ISO 9001, AS9100 |
| Precision Mold & Machining Services Inc Milling, EDM · ITAR | Warren, MI | MillingEDM | ITAR |
| Precision Molding & Machining Milling, EDM · ISO 9001 | Sparks, NV | MillingEDM | ISO 9001 |
| Prieto Machine Co Inc Milling, Turning, Bending, Welding, EDM · ISO 9001, AS9100 | Warminster, PA | MillingTurningBendingWeldingEDM | ISO 9001, AS9100 |
| Primary Flow Signal Inc Milling, Turning, Welding, EDM · ITAR | Cranston, RI | MillingTurningWeldingEDM | ITAR |
| Pro Machine & Engineering Milling, Turning, Welding, EDM, Metal AM · ISO 9001, AS9100, ITAR | Colorado Springs, CO | MillingTurningWeldingEDMMetal AM | ISO 9001, AS9100, ITAR |
| Pronto Manufacturing Milling, Turning, EDM, Stamping | Ronkonkoma, NY | MillingTurningEDMStamping | - |
| Protofab Engineering Inc Milling, Turning, Swiss, Welding, EDM, Finishing · ISO 9001, AS9100, ITAR, ISO 13485 | Blaine, MN | MillingTurningSwissWeldingEDMFinishing | ISO 9001, AS9100, ITAR, ISO 13485 |
| Pulse Precision LLC Milling, EDM · ISO 9001 | Santa Ana, CA | MillingEDM | ISO 9001 |
| QTA Machining Milling, Turning, EDM · ISO 9001 | Buffalo, NY | MillingTurningEDM | ISO 9001 |
| Quadrant Tool and Manufacturing Company Milling, Turning, EDM, Grinding, Finishing | Schaumburg, IL | MillingTurningEDMGrindingFinishing | - |
| R & M Machine Shop, Inc Milling, Turning, Welding, EDM, Finishing · ISO 9001, ITAR | Fyffe, AL | MillingTurningWeldingEDMFinishing | ISO 9001, ITAR |
| R & S Machining Inc Milling, Turning, Welding, EDM, Grinding · ISO 9001, AS9100 | Saint Louis, MO | MillingTurningWeldingEDMGrinding | ISO 9001, AS9100 |
| R. J. Zeman Tool & Mfg. Co., Inc Milling, Turning, Welding, Casting, EDM, Grinding · ISO 9001, ITAR | Waukesha, WI | MillingTurningWeldingCastingEDMGrinding | ISO 9001, ITAR |
| R.M. Baker Machine & Tool, Inc Milling, Welding, EDM, Grinding, Finishing | Covina, CA | MillingWeldingEDMGrindingFinishing | - |
| Ram Tool Inc Milling, Turning, Welding, Casting, EDM, Grinding · ISO 9001, ITAR | Grafton, WI | MillingTurningWeldingCastingEDMGrinding | ISO 9001, ITAR |
| Ramco Machine LLC Milling, Turning, EDM | Rowley, MA | MillingTurningEDM | - |
| Range Precision Milling, Turning, EDM, Grinding, Finishing | Blaine, MN | MillingTurningEDMGrindingFinishing | - |
| Rapid Precision Works LLC Milling, Turning, EDM | Alachua, FL | MillingTurningEDM | - |
| Rapid Prototyping & Engineering, Inc Milling, Turning, Waterjet, Welding, EDM, Assembly | Franklin, IN | MillingTurningWaterjetWeldingEDMAssembly | - |
| Rathburn Precision Machining Milling, Turning, Swiss, EDM | Auburn, IN | MillingTurningSwissEDM | - |
| RDL Machine, LLC Milling, Turning, Waterjet, Welding, Stamping, EDM, Grinding · ISO 9001, AS9100 | Bossier City, LA | MillingTurningWaterjetWeldingStampingEDMGrinding | ISO 9001, AS9100 |
| Reardon Machine Co Inc Milling, Turning, Welding, Stamping, EDM, Grinding | Saint Joseph, MO | MillingTurningWeldingStampingEDMGrinding | - |