| Paramount Machine Milling, Turning, EDM · ISO 9001, AS9100, ITAR | Salt Lake City, UT | MillingTurningEDM | ISO 9001, AS9100, ITAR |
| Perseo-Erie Machine Sales Milling, Laser, EDM, Stamping | Erie, PA | MillingLaserEDMStamping | - |
| Petersen Precision Engineering LLC Milling, Turning, Swiss, EDM, Grinding, Finishing · ISO 9001, AS9100, ISO 13485 | Redwood City, CA | MillingTurningSwissEDMGrindingFinishing | ISO 9001, AS9100, ISO 13485 |
| PGI Milling, Turning, Bending, Laser, Welding, Waterjet, EDM · AS9100, ITAR | Albuquerque, NM | MillingTurningBendingLaserWeldingWaterjetEDM | AS9100, ITAR |
| Precision Cutter & Tool Co Milling, Turning, Stamping, EDM, Grinding · ISO 9001 | Lebanon, MO | MillingTurningStampingEDMGrinding | ISO 9001 |
| Primary Flow Signal Inc Milling, Turning, Welding, EDM · ITAR | Cranston, RI | MillingTurningWeldingEDM | ITAR |
| Princeton Tool Inc Milling, Waterjet, Casting, EDM, Grinding, Assembly · AS9100, NADCAP | Mentor, OH | MillingWaterjetCastingEDMGrindingAssembly | AS9100, NADCAP |
| 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 |
| 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 |
| Prototype & Production Co., Inc Milling, Turning, EDM, Grinding, Assembly · ISO 9001, ITAR | Wheeling, IL | MillingTurningEDMGrindingAssembly | ISO 9001, ITAR |
| Quality Machining Inc Milling, Turning, Welding, Stamping, EDM, Grinding, Finishing | Waunakee, WI | MillingTurningWeldingStampingEDMGrindingFinishing | - |
| R & S Machining Inc Milling, Turning, Welding, EDM, Grinding · ISO 9001, AS9100 | Saint Louis, MO | MillingTurningWeldingEDMGrinding | ISO 9001, AS9100 |
| Ram Aerospace Inc Milling, Turning, Laser, Waterjet, EDM, Grinding, Assembly · AS9100, ITAR | Brea, CA | MillingTurningLaserWaterjetEDMGrindingAssembly | AS9100, ITAR |
| Ram Tool Inc Milling, Turning, Welding, Casting, EDM, Grinding · ISO 9001, ITAR | Grafton, WI | MillingTurningWeldingCastingEDMGrinding | ISO 9001, ITAR |
| Rapid Expedite Machine Service, LLC Milling, Waterjet, Welding, EDM · ISO 9001, AS9100, ITAR | Cocoa, FL | MillingWaterjetWeldingEDM | ISO 9001, AS9100, ITAR |
| Rapid Manufacturing Company, LLC Welding, Metal AM, EDM · ISO 9001, ITAR | Eau Claire, WI | WeldingMetal AMEDM | ISO 9001, ITAR |
| Rapid Precision Works LLC Milling, Turning, EDM | Alachua, FL | MillingTurningEDM | - |
| Reardon Machine Co Inc Milling, Turning, Welding, Stamping, EDM, Grinding | Saint Joseph, MO | MillingTurningWeldingStampingEDMGrinding | - |
| Rensberger Technologies Milling, Turning, EDM · AS9100, ITAR, CMMC | Sioux Falls, SD | MillingTurningEDM | AS9100, ITAR, CMMC |
| Resivine LLC Milling, Turning, Waterjet, EDM, Grinding | Houston, TX | MillingTurningWaterjetEDMGrinding | - |
| Rimeco Products Inc Milling, Turning, EDM · AS9100, ITAR, NADCAP | Willoughby, OH | MillingTurningEDM | AS9100, ITAR, NADCAP |
| Rincon Engineering Corporation Milling, Turning, Laser, Waterjet, Punching, Welding, Stamping, EDM, Finishing · ISO 9001, AS9100 | Carpinteria, CA | MillingTurningLaserWaterjetPunchingWeldingStampingEDMFinishing | ISO 9001, AS9100 |
| RJ Enterprises Milling, Turning, EDM · ISO 9001, AS9100, ITAR | Gardena, CA | MillingTurningEDM | ISO 9001, AS9100, ITAR |
| Roysters Machine Shop LLC Milling, Turning, Waterjet, Welding, Stamping, EDM · ISO 9001 | Henderson, KY | MillingTurningWaterjetWeldingStampingEDM | ISO 9001 |
| Rozic Tool & Machine LLC Milling, Turning, EDM · ISO 9001 | Euclid, OH | MillingTurningEDM | ISO 9001 |
| S & S Tool & Machine Co Milling, Turning, Welding, EDM, Grinding · ISO 9001, AS9100, ITAR | Louisville, KY | MillingTurningWeldingEDMGrinding | ISO 9001, AS9100, ITAR |
| Saliga Machine Co Inc Milling, Bending, Welding, Stamping, EDM, Finishing · ISO 9001 | Hudson, MA | MillingBendingWeldingStampingEDMFinishing | ISO 9001 |
| San Diego Precision Machining Inc Milling, Turning, Welding, EDM · ISO 9001, AS9100 | San Diego, CA | MillingTurningWeldingEDM | ISO 9001, AS9100 |
| Savage Machining Inc Milling, Turning, EDM, Finishing, Assembly · ISO 9001 | Simi Valley, CA | MillingTurningEDMFinishingAssembly | ISO 9001 |
| Schmiede Corporation Milling, Turning, Welding, EDM, Grinding, Assembly · ISO 9001 | Tullahoma, TN | MillingTurningWeldingEDMGrindingAssembly | ISO 9001 |
| Schneiders Manufacturing Inc Milling, Turning, Swiss, EDM, Grinding · ISO 9001, AS9100, ITAR | Sun Valley, CA | MillingTurningSwissEDMGrinding | ISO 9001, AS9100, ITAR |
| Selectwo Machine Company, Inc Milling, Turning, Welding, Stamping, EDM · ISO 9001, AS9100 | Longwood, FL | MillingTurningWeldingStampingEDM | ISO 9001, AS9100 |
| Seyer Industries Inc Welding, EDM, Assembly | Saint Peters, MO | WeldingEDMAssembly | - |
| Smith Metal, LLC Milling, Turning, Swiss, Laser, Waterjet, Bending, Welding, EDM, Grinding, Finishing · ISO 9001 | Augusta, MI | MillingTurningSwissLaserWaterjetBendingWeldingEDMGrindingFinishing | ISO 9001 |
| South Bend Form Tool Co Milling, Turning, EDM | South Bend, IN | MillingTurningEDM | - |
| Southwest Greene International Inc Milling, Turning, Stamping, Metal AM, EDM | Oceanside, CA | MillingTurningStampingMetal AMEDM | - |
| Specialty Machine Milling, Turning, Swiss, Laser, Bending, Welding, EDM, Grinding, Assembly · ISO 9001, AS9100, ITAR | Lago Vista, TX | MillingTurningSwissLaserBendingWeldingEDMGrindingAssembly | ISO 9001, AS9100, ITAR |
| Spectrum Custom Molds & Manufacturing, Inc Milling, Turning, Laser, Welding, EDM, Grinding, Finishing, Assembly · ISO 9001 | Palmetto, FL | MillingTurningLaserWeldingEDMGrindingFinishingAssembly | ISO 9001 |
| Spring Creek Machining, Inc Milling, Turning, Waterjet, Bending, Welding, EDM, Grinding, Finishing | Lowell, AR | MillingTurningWaterjetBendingWeldingEDMGrindingFinishing | - |
| Stampede Die Corp Milling, Turning, Waterjet, Welding, Casting, EDM | Wayland, MI | MillingTurningWaterjetWeldingCastingEDM | - |
| Starlite Diversified Inc Milling, Turning, Welding, EDM, Grinding | Meadville, PA | MillingTurningWeldingEDMGrinding | - |
| Starn Tool & Manufacturing Company Milling, Turning, EDM, Grinding, Finishing · ISO 9001, ITAR | Meadville, PA | MillingTurningEDMGrindingFinishing | ISO 9001, ITAR |
| Steelhead Metal Corp Milling, Turning, Laser, Waterjet, Bending, EDM, Finishing · ISO 9001 | Nampa, ID | MillingTurningLaserWaterjetBendingEDMFinishing | ISO 9001 |
| Stephens Precision, Inc Milling, Turning, Welding, EDM, Grinding, Assembly · ISO 9001, AS9100, ITAR | Bradford, VT | MillingTurningWeldingEDMGrindingAssembly | ISO 9001, AS9100, ITAR |
| Stork Precision Machining LLC Milling, Turning, Welding, EDM, Grinding · ISO 9001, CMMC | Washington, MO | MillingTurningWeldingEDMGrinding | ISO 9001, CMMC |
| Straton Industries Inc Milling, Turning, Stamping, EDM, Grinding, Finishing, Assembly · AS9100, ITAR, CMMC | Stratford, CT | MillingTurningStampingEDMGrindingFinishingAssembly | AS9100, ITAR, CMMC |
| Strohwig Industries, Inc Milling, Turning, Casting, EDM, Grinding, Finishing, Assembly · ISO 9001, ITAR, CMMC | Richfield, WI | MillingTurningCastingEDMGrindingFinishingAssembly | ISO 9001, ITAR, CMMC |
| Subtract LLC Milling, Turning, Swiss, Laser, Waterjet, Welding, EDM, Finishing | Muncie, IN | MillingTurningSwissLaserWaterjetWeldingEDMFinishing | - |
| Superior Jig Inc Milling, EDM · ISO 9001, ITAR | Anaheim, CA | MillingEDM | ISO 9001, ITAR |