| PHES Machining Milling, Turning | Riverside, CA | MillingTurning | - |
| PNM Co Milling, Turning · ISO 9001 | Fresno, CA | MillingTurning | ISO 9001 |
| Port City Metal Services Milling, Welding | Tulsa, OK | MillingWelding | - |
| 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 Fabrication, Inc. Milling, Bending, Laser, Welding, Waterjet | Fort Wayne, IN | MillingBendingLaserWeldingWaterjet | - |
| Precision Machining & Fab Milling, Turning, Bending, Laser, Welding, Waterjet · ISO 9001, AS9100, ITAR | Anaheim, CA | MillingTurningBendingLaserWeldingWaterjet | ISO 9001, AS9100, 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 |
| 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 Cut CNC Machine Milling · ISO 9001, AS9100, ITAR | Hooksett, NH | Milling | ISO 9001, AS9100, ITAR |
| 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 | - |
| Proteum Machining Milling | Tucson, AZ | Milling | - |
| 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 |
| Rand Machine Works Milling, Turning, Bending, Welding | Fresno, CA | MillingTurningBendingWelding | - |
| Ravelin Defense Milling, Turning, Bending, Laser, Welding, Waterjet · ISO 9001, AS9100, ITAR, CMMC | Green Bay, WI | MillingTurningBendingLaserWeldingWaterjet | ISO 9001, AS9100, ITAR, CMMC |
| RDR Precision Tech Milling, Turning · ISO 9001 | Bakersfield, CA | MillingTurning | ISO 9001 |
| Redstone Manufacturing USA Milling, Bending, Laser, Welding, Stamping, Casting · ISO 9001, AS9100, IATF 16949 | Seattle, WA | MillingBendingLaserWeldingStampingCasting | ISO 9001, AS9100, IATF 16949 |
| Remarc Manufacturing Milling, Turning, Welding, Waterjet, Metal AM | Reno, NV | MillingTurningWeldingWaterjetMetal AM | - |
| Rensberger Technologies Milling, Turning, EDM · AS9100, ITAR, CMMC | Sioux Falls, SD | MillingTurningEDM | AS9100, ITAR, CMMC |
| Restless Machines LLC Milling, Turning | Greenville, SC | MillingTurning | - |
| Richards Machining Co Inc Milling, Turning | Santa Clara, CA | MillingTurning | - |
| RivCut Milling, Turning, Bending, Metal AM · ISO 9001, AS9100, ITAR | Union City, CA | MillingTurningBendingMetal AM | ISO 9001, AS9100, ITAR |
| RJ Enterprises Milling, Turning, EDM · ISO 9001, AS9100, ITAR | Gardena, CA | MillingTurningEDM | ISO 9001, AS9100, ITAR |
| RJC Manufacturing Services LLC Milling, Turning, Bending, Welding | Irwin, PA | MillingTurningBendingWelding | - |
| Roemer Machine Milling, Welding | Davenport, IA | MillingWelding | - |
| Rosko Manufacturing Milling, Turning, Metal AM | Grimes, IA | MillingTurningMetal AM | - |
| S & H Machine Co Inc Milling, Turning | Buffalo, NY | MillingTurning | - |
| S & S Machine Milling, Turning, Bending, Welding, Waterjet, EDM | Amherst, NH | MillingTurningBendingWeldingWaterjetEDM | - |
| S&W Precision Machining LLC Milling, Turning · ISO 9001, AS9100, ITAR, CMMC | Commerce City, CO | MillingTurning | ISO 9001, AS9100, ITAR, CMMC |
| Sanders Metal Products Inc Milling, Turning, Bending, Welding | Fargo, ND | MillingTurningBendingWelding | - |
| Selway Machine Tool Co Inc Milling, Turning, Metal AM | Salt Lake City, UT | MillingTurningMetal AM | - |
| SendCutSend Milling, Bending, Laser, Welding, Waterjet | Reno, NV | MillingBendingLaserWeldingWaterjet | - |
| Sepco Erie Milling, Turning, Stamping · ISO 9001 | Erie, PA | MillingTurningStamping | ISO 9001 |
| Shamrock Machining Inc Milling, Turning, Bending, Laser, Welding · ISO 9001 | Spokane Valley, WA | MillingTurningBendingLaserWelding | ISO 9001 |
| Shamrock Precision Milling, Turning, Bending · ISO 9001, AS9100 | Dallas, TX | MillingTurningBending | ISO 9001, AS9100 |
| Sharp Tool Manufacturing Milling, Turning, Welding · ISO 9001, AS9100, ITAR, CMMC | Ogden, UT | MillingTurningWelding | ISO 9001, AS9100, ITAR, CMMC |
| Sharp Tooling Company Milling, Turning, Bending, Welding, Waterjet, EDM, Stamping, Metal AM | Buffalo, NY | MillingTurningBendingWeldingWaterjetEDMStampingMetal AM | - |
| Sick Fab LLC Milling, Bending, Welding | Las Vegas, NV | MillingBendingWelding | - |