| Pricewalker Inc Milling, Bending, Welding, Grinding, Finishing, Assembly | North Chesterfield, VA | MillingBendingWeldingGrindingFinishingAssembly | - |
| Pro Cam Services LLC Milling, Turning, Waterjet, Welding, Finishing | Zeeland, MI | MillingTurningWaterjetWeldingFinishing | - |
| Pro-Type Industries Inc Milling, Turning, Laser, Punching, Bending, Welding, Stamping, Finishing · ISO 9001 | Sterling, VA | MillingTurningLaserPunchingBendingWeldingStampingFinishing | ISO 9001 |
| Process Stainless Lab Welding, Finishing, Assembly · ISO 9001 | Milpitas, CA | WeldingFinishingAssembly | ISO 9001 |
| Production Pattern and Foundry Co Inc Milling, Turning, Casting, Finishing · ISO 9001, IATF 16949 | Mound House, NV | MillingTurningCastingFinishing | ISO 9001, IATF 16949 |
| Proto Xyz, Inc Milling, Turning, Laser, Waterjet, Grinding, Finishing · ISO 9001, ITAR | New Bedford, MA | MillingTurningLaserWaterjetGrindingFinishing | ISO 9001, ITAR |
| Protofab Engineering Inc Milling, Turning, Swiss, Welding, EDM, Finishing · ISO 9001, AS9100, ITAR, ISO 13485 | Blaine, MN | MillingTurningSwissWeldingEDMFinishing | ISO 9001, AS9100, ITAR, ISO 13485 |
| Prototek Digital ManufacturingVerified Milling, Turning, Laser, Waterjet, Bending, Welding, EDM, Finishing, Assembly · ISO 9001, AS9100, ITAR, NADCAP, CMMC | Menomonie, WI | MillingTurningLaserWaterjetBendingWeldingEDMFinishingAssembly | ISO 9001, AS9100, ITAR, NADCAP, CMMC |
| PT Coupling Milling, Turning, Welding, Casting, Grinding, Finishing · ISO 9001 | Enid, OK | MillingTurningWeldingCastingGrindingFinishing | ISO 9001 |
| Pulsar Machining LLC Milling, Turning, Laser, Finishing · ISO 9001, ITAR | Rosenberg, TX | MillingTurningLaserFinishing | ISO 9001, ITAR |
| Pure-Logic Industries Inc Milling, Laser, Waterjet, Bending, Welding, Finishing · ISO 9001, AS9100, NADCAP | Gilbert, AZ | MillingLaserWaterjetBendingWeldingFinishing | ISO 9001, AS9100, NADCAP |
| PW Jet Laser, Waterjet, Bending, Welding, Stamping, Finishing · ISO 9001 | Crystal Lake, IL | LaserWaterjetBendingWeldingStampingFinishing | ISO 9001 |
| Q Company, LLC Milling, Turning, Welding, Grinding, Finishing · ISO 9001, AS9100, ITAR | New Berlin, PA | MillingTurningWeldingGrindingFinishing | ISO 9001, AS9100, ITAR |
| Qmac-Quality Machining Inc Milling, Turning, Waterjet, Punching, Welding, Finishing · ITAR | Bellefonte, PA | MillingTurningWaterjetPunchingWeldingFinishing | ITAR |
| Quadrant Tool and Manufacturing Company Milling, Turning, EDM, Grinding, Finishing | Schaumburg, IL | MillingTurningEDMGrindingFinishing | - |
| Qualitask Inc Milling, Turning, Swiss, Welding, EDM, Grinding, Finishing, Assembly · ISO 9001, AS9100 | Anaheim, CA | MillingTurningSwissWeldingEDMGrindingFinishingAssembly | ISO 9001, AS9100 |
| Quality Grinding Co, Inc Milling, Turning, Welding, Grinding, Finishing · ISO 9001, AS9100 | Buena Park, CA | MillingTurningWeldingGrindingFinishing | ISO 9001, AS9100 |
| Quality Metal Finishing Corporation Finishing · ISO 9001 | Paterson, NJ | Finishing | ISO 9001 |
| Quick Turn Anodizing LLC Finishing · ISO 9001, AS9100, ITAR | Edinburgh, IN | Finishing | ISO 9001, AS9100, ITAR |
| R & M Machine Shop, Inc Milling, Turning, Welding, EDM, Finishing · ISO 9001, ITAR | Fyffe, AL | MillingTurningWeldingEDMFinishing | ISO 9001, ITAR |
| R. A. Zweig, Inc Milling, Swiss, Finishing, Assembly | Glenview, IL | MillingSwissFinishingAssembly | - |
| Radian Thermal Products, Inc Milling, Casting, Finishing · ISO 9001, ITAR | Santa Clara, CA | MillingCastingFinishing | ISO 9001, ITAR |
| Rah Industries Inc Milling, Turning, Laser, Waterjet, Punching, Bending, Welding, Finishing, Assembly · ISO 9001, AS9100, NADCAP | Santa Clarita, CA | MillingTurningLaserWaterjetPunchingBendingWeldingFinishingAssembly | ISO 9001, AS9100, NADCAP |
| Range Precision Milling, Turning, EDM, Grinding, Finishing | Blaine, MN | MillingTurningEDMGrindingFinishing | - |
| Ray Machine Inc Milling, Turning, Laser, Bending, Welding, Finishing · ISO 9001, AS9100 | Middle River, MD | MillingTurningLaserBendingWeldingFinishing | ISO 9001, AS9100 |
| RCI Custom Milling, Laser, Bending, Welding, Finishing · ISO 9001 | Frederick, MD | MillingLaserBendingWeldingFinishing | ISO 9001 |
| RDS Machine, LLC Milling, Turning, Finishing · ISO 9001, AS9100, ITAR, NADCAP | Newport, NH | MillingTurningFinishing | ISO 9001, AS9100, ITAR, NADCAP |
| Redbell Manufacturing LLC Milling, Turning, Finishing, Assembly | Logan, UT | MillingTurningFinishingAssembly | - |
| Regal Research & Manufacturing Co LLC Milling, Turning, Bending, Welding, Grinding, Finishing, Assembly · ISO 9001, AS9100, ITAR | Plano, TX | MillingTurningBendingWeldingGrindingFinishingAssembly | ISO 9001, AS9100, ITAR |
| Reisinger Automation & Design LLC Milling, Turning, Waterjet, Welding, Grinding, Finishing | Reading, PA | MillingTurningWaterjetWeldingGrindingFinishing | - |
| Responsible Metal Fab Inc Welding, Finishing, Assembly · ISO 9001 | Sunnyvale, CA | WeldingFinishingAssembly | ISO 9001 |
| Revolution Precision Machining LLC Swiss, Grinding, Finishing · ISO 9001, AS9100 | Tulsa, OK | SwissGrindingFinishing | ISO 9001, AS9100 |
| RHS Precision LLC Milling, Turning, Finishing · ITAR | Edgewood, MD | MillingTurningFinishing | ITAR |
| Ricaurte Precision Inc Milling, Turning, Swiss, Laser, EDM, Finishing, Assembly · ISO 9001, ITAR | Santa Ana, CA | MillingTurningSwissLaserEDMFinishingAssembly | ISO 9001, ITAR |
| Rice Precision Manufacturing Inc Milling, Turning, Swiss, Laser, Waterjet, Welding, Finishing, Assembly · ISO 9001, AS9100 | Baldwin City, KS | MillingTurningSwissLaserWaterjetWeldingFinishingAssembly | ISO 9001, AS9100 |
| Rie Coatings, LLC Stamping, Finishing · ISO 9001, AS9100 | Albuquerque, NM | StampingFinishing | ISO 9001, AS9100 |
| Rigid Concepts LLC Milling, Turning, Finishing · ISO 9001, ITAR | Van Alstyne, TX | MillingTurningFinishing | ISO 9001, ITAR |
| Rincon Engineering Corporation Milling, Turning, Laser, Waterjet, Punching, Welding, Stamping, EDM, Finishing · ISO 9001, AS9100 | Carpinteria, CA | MillingTurningLaserWaterjetPunchingWeldingStampingEDMFinishing | ISO 9001, AS9100 |
| Roaring Creek Machine Co Milling, Turning, Laser, Bending, Welding, Finishing · ITAR | Catawissa, PA | MillingTurningLaserBendingWeldingFinishing | ITAR |
| Rocky Mountain Waterjet, LLC Laser, Waterjet, Bending, Welding, Finishing | Greeley, CO | LaserWaterjetBendingWeldingFinishing | - |
| Ross Manufacturing, Inc Milling, Turning, Laser, Bending, Welding, Finishing | Saint Francis, KS | MillingTurningLaserBendingWeldingFinishing | - |
| Roush & Yates Racing Engines LLC Milling, Turning, Swiss, Waterjet, Finishing · AS9100, ITAR, NADCAP, ISO 13485 | Mooresville, NC | MillingTurningSwissWaterjetFinishing | AS9100, ITAR, NADCAP, ISO 13485 |
| S&B Metal Products of Daytona LLC Laser, Punching, Bending, Welding, Finishing | Daytona Beach, FL | LaserPunchingBendingWeldingFinishing | - |
| Saar Corp Milling, Turning, Swiss, Finishing, Assembly · AS9100 | Farmington, CT | MillingTurningSwissFinishingAssembly | AS9100 |
| Saporito Finishing Co Welding, Finishing · NADCAP | Cicero, IL | WeldingFinishing | NADCAP |
| Sapphire Metal Finishing, Inc Finishing · ISO 9001, NADCAP | Caldwell, ID | Finishing | ISO 9001, NADCAP |
| Savage Machining Inc Milling, Turning, EDM, Finishing, Assembly · ISO 9001 | Simi Valley, CA | MillingTurningEDMFinishingAssembly | ISO 9001 |
| Schaefer Screw Products Co Milling, Turning, Grinding, Finishing | Garden City, MI | MillingTurningGrindingFinishing | - |
| Schmid Tool & Engineering Corp Milling, Turning, Swiss, Stamping, Grinding, Finishing, Assembly · ISO 9001, ITAR | Villa Park, IL | MillingTurningSwissStampingGrindingFinishingAssembly | ISO 9001, ITAR |
| Seconn Fabrication LLC Laser, Punching, Bending, Welding, Finishing | Waterford, CT | LaserPunchingBendingWeldingFinishing | - |