| Precision Ceramics USA Grinding | Palmetto, FL | Grinding | - |
| 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 Die Systems Corp Milling, Welding, Grinding | Chippewa Falls, WI | MillingWeldingGrinding | - |
| Precision Roll Grinders Inc Grinding, Finishing | Allentown, PA | GrindingFinishing | - |
| Precision Sheet Metal Supply Inc Milling, Turning, Punching, Bending, Welding, Grinding | Herndon, VA | MillingTurningPunchingBendingWeldingGrinding | - |
| Production Speed Fixtures, LLC Milling, Turning, Laser, Welding, Grinding | Wingate, NC | MillingTurningLaserWeldingGrinding | - |
| PT Coupling Milling, Turning, Welding, Casting, Grinding, Finishing · ISO 9001 | Enid, OK | MillingTurningWeldingCastingGrindingFinishing | ISO 9001 |
| QTM Inc Milling, Turning, Waterjet, Bending, Welding, Grinding | Oldsmar, FL | MillingTurningWaterjetBendingWeldingGrinding | - |
| Quadrant Tool and Manufacturing Company Milling, Turning, EDM, Grinding, Finishing | Schaumburg, IL | MillingTurningEDMGrindingFinishing | - |
| Quality Castings Co Casting, Grinding · ISO 9001 | Orrville, OH | CastingGrinding | ISO 9001 |
| Quality Grinding Co, Inc Milling, Turning, Welding, Grinding, Finishing · ISO 9001, AS9100 | Buena Park, CA | MillingTurningWeldingGrindingFinishing | ISO 9001, AS9100 |
| R & S Machining Inc Milling, Turning, Welding, EDM, Grinding · ISO 9001, AS9100 | Saint Louis, MO | MillingTurningWeldingEDMGrinding | ISO 9001, AS9100 |
| R. B. Machine Company, Inc Turning, Welding, Grinding · ISO 9001, AS9100 | Phoenix, AZ | TurningWeldingGrinding | 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 | - |
| R&D Manco Milling, Turning, Grinding · ISO 9001 | Phoenix, AZ | MillingTurningGrinding | ISO 9001 |
| R2 Precision Machining LLC Milling, Turning, Forging, Grinding · ISO 9001 | Rancho Cucamonga, CA | MillingTurningForgingGrinding | ISO 9001 |
| Radiant Engineering and Manufacturing, LLC Milling, Grinding, Finishing · CMMC | Sterling Heights, MI | MillingGrindingFinishing | CMMC |
| Radical Fabrications LLC Milling, Turning, Welding, Grinding | Lancaster, CA | MillingTurningWeldingGrinding | - |
| Ram Tool Inc Milling, Turning, Welding, Casting, EDM, Grinding · ISO 9001, ITAR | Grafton, WI | MillingTurningWeldingCastingEDMGrinding | ISO 9001, ITAR |
| Range Precision Milling, Turning, EDM, Grinding, Finishing | Blaine, MN | MillingTurningEDMGrindingFinishing | - |
| RB Industrial Manufacturer LLC Milling, Swiss, Grinding | Racine, WI | MillingSwissGrinding | - |
| RB Machining, Inc Milling, Turning, Grinding · AS9100 | Palmdale, CA | MillingTurningGrinding | AS9100 |
| 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 | - |
| Red Lion Inc Laser, Grinding · AS9100 | Broomfield, CO | LaserGrinding | AS9100 |
| Reisinger Automation & Design LLC Milling, Turning, Waterjet, Welding, Grinding, Finishing | Reading, PA | MillingTurningWaterjetWeldingGrindingFinishing | - |
| Reliance Machining Inc Milling, Turning, Welding, Grinding | Minneapolis, MN | MillingTurningWeldingGrinding | - |
| Resivine LLC Milling, Turning, Waterjet, EDM, Grinding | Houston, TX | MillingTurningWaterjetEDMGrinding | - |
| Reuss Industries, Inc Milling, Turning, Waterjet, Welding, EDM, Grinding | Madison, PA | MillingTurningWaterjetWeldingEDMGrinding | - |
| Reynolda Manufacturing Solutions, Inc Milling, Welding, EDM, Grinding · ISO 9001 | East Bend, NC | MillingWeldingEDMGrinding | ISO 9001 |
| Rig Machine Works LLC Milling, Turning, Bending, Welding, Grinding | Stevensville, MT | MillingTurningBendingWeldingGrinding | - |
| Ring Precision Milling, Turning, Swiss, Welding, EDM, Grinding | Jamestown, NY | MillingTurningSwissWeldingEDMGrinding | - |
| Riverside Machine & Automation Inc Milling, Turning, Welding, Stamping, Grinding, Assembly | Genoa, OH | MillingTurningWeldingStampingGrindingAssembly | - |
| Rota Industries Milling, Turning, EDM, Grinding, Assembly | Farmingdale, NY | MillingTurningEDMGrindingAssembly | - |
| Royal Coatings Grinding, Finishing | Simi Valley, CA | GrindingFinishing | - |
| RS Precision Milling, Turning, Swiss, EDM, Grinding · ISO 9001, AS9100, ITAR, CMMC | Farmingdale, NY | MillingTurningSwissEDMGrinding | ISO 9001, AS9100, ITAR, CMMC |
| Safarik Tool Co Inc Milling, Turning, Grinding · ISO 9001 | Valley Center, KS | MillingTurningGrinding | ISO 9001 |
| Saliba Industries Milling, Turning, Grinding | Waukegan, IL | MillingTurningGrinding | - |
| Sanks Machining Inc Milling, Turning, Waterjet, Welding, EDM, Grinding | Staunton, IL | MillingTurningWaterjetWeldingEDMGrinding | - |
| Santa Lucia Manufacturing, Inc Milling, Turning, Grinding | Atascadero, CA | MillingTurningGrinding | - |
| Schneiders Manufacturing Inc Milling, Turning, Swiss, EDM, Grinding · ISO 9001, AS9100, ITAR | Sun Valley, CA | MillingTurningSwissEDMGrinding | ISO 9001, AS9100, ITAR |
| Scientific Tool Milling, Turning, Grinding | Syracuse, NY | MillingTurningGrinding | - |
| SDS Engineering Milling, Turning, Grinding · ISO 9001 | Sun Valley, CA | MillingTurningGrinding | ISO 9001 |
| Serrano Industries, Inc Milling, Turning, Swiss, EDM, Grinding · ISO 9001, AS9100 | Santa Fe Springs, CA | MillingTurningSwissEDMGrinding | ISO 9001, AS9100 |
| Sharp Dimension Inc Milling, Turning, Bending, Welding, Grinding, Finishing, Assembly · ISO 9001, ITAR | Fremont, CA | MillingTurningBendingWeldingGrindingFinishingAssembly | ISO 9001, ITAR |
| Shoemaker Mfg Solutions Inc Milling, Turning, Laser, Waterjet, Punching, Bending, Welding, Stamping, Grinding · ISO 9001, AS9100, ITAR, CMMC | Souderton, PA | MillingTurningLaserWaterjetPunchingBendingWeldingStampingGrinding | ISO 9001, AS9100, ITAR, CMMC |
| Short Run Pro LLC Bending, Welding, Grinding · ISO 9001 | Belmont, NC | BendingWeldingGrinding | ISO 9001 |
| Silicon Valley Precision Inc Milling, Turning, Welding, Casting, Grinding, Finishing · ITAR | Livermore, CA | MillingTurningWeldingCastingGrindingFinishing | ITAR |