| R E Dye Manufacturing Corp Milling, Turning, Finishing, Assembly · AS9100 | Breckenridge, TX | MillingTurningFinishingAssembly | AS9100 |
| Resivine LLC Milling, Turning, Waterjet, EDM, Grinding | Houston, TX | MillingTurningWaterjetEDMGrinding | - |
| Revolution CNC LLC Milling, Turning, Welding | Hackettstown, NJ | MillingTurningWelding | - |
| Rice Precision Manufacturing Inc Milling, Turning, Swiss, Laser, Waterjet, Welding, Finishing, Assembly · ISO 9001, AS9100 | Baldwin City, KS | MillingTurningSwissLaserWaterjetWeldingFinishingAssembly | ISO 9001, AS9100 |
| Rincon Engineering Corporation Milling, Turning, Laser, Waterjet, Punching, Welding, Stamping, EDM, Finishing · ISO 9001, AS9100 | Carpinteria, CA | MillingTurningLaserWaterjetPunchingWeldingStampingEDMFinishing | ISO 9001, AS9100 |
| Roberts Precision Machine Inc Milling, Turning, Swiss · ISO 9001, AS9100, ISO 13485 | Monroe, WA | MillingTurningSwiss | ISO 9001, AS9100, ISO 13485 |
| Sales & Engineering Inc Milling, Turning, Bending, Welding, Stamping | Livonia, MI | MillingTurningBendingWeldingStamping | - |
| Serrmi Products LLC Milling, Turning, Laser, Punching, Bending, Finishing | Pittsburg, KS | MillingTurningLaserPunchingBendingFinishing | - |
| Sharp Tooling Company Milling, Turning, Bending, Welding, Waterjet, EDM, Stamping, Metal AM | Buffalo, NY | MillingTurningBendingWeldingWaterjetEDMStampingMetal AM | - |
| SKP Machine Enterprises LLC Milling, Turning | Monticello, KY | MillingTurning | - |
| Southwest Greene International Inc Milling, Turning, Stamping, Metal AM, EDM | Oceanside, CA | MillingTurningStampingMetal AMEDM | - |
| Specialty Roller and Machine Inc Milling, Turning, Grinding | Berwick, PA | MillingTurningGrinding | - |
| Sse Steel Fabrication Milling, Turning, Bending, Welding | Saint Bernard, LA | MillingTurningBendingWelding | - |
| Stone Machine Co. Inc Milling, Turning, Grinding, Finishing | Chester, NH | MillingTurningGrindingFinishing | - |
| Strom Manufacturing, LLC Milling, Turning, Finishing, Assembly · ISO 9001 | North Plains, OR | MillingTurningFinishingAssembly | ISO 9001 |
| Superior Tooling Inc Milling, Turning, Swiss, Bending, Welding, Stamping, EDM, Grinding · ISO 9001 | Wapello, IA | MillingTurningSwissBendingWeldingStampingEDMGrinding | ISO 9001 |
| Texarkana Machine Inc Milling, Turning, Waterjet, Welding, Grinding, Finishing | Texarkana, TX | MillingTurningWaterjetWeldingGrindingFinishing | - |
| Trust Manufacturing LLC Milling, Turning, Waterjet, Bending, Forging, EDM, Grinding, Finishing | Euclid, OH | MillingTurningWaterjetBendingForgingEDMGrindingFinishing | - |
| Turntec Manufacturing Milling, Turning, Welding, Grinding | Mills, WY | MillingTurningWeldingGrinding | - |
| U.m.c., Inc Milling, Turning, Welding, Stamping, EDM, Grinding, Finishing · ISO 9001, ITAR, ISO 13485 | Monticello, MN | MillingTurningWeldingStampingEDMGrindingFinishing | ISO 9001, ITAR, ISO 13485 |
| Ultimate Manufacturing, Inc Milling, Turning, Grinding | Oakland Park, FL | MillingTurningGrinding | - |
| Ultrastratech LLC Milling, Turning, Bending, Stamping · CMMC | Tucson, AZ | MillingTurningBendingStamping | CMMC |
| Universal Machine & Tool, Inc Milling, Turning, Laser, Waterjet, Bending, Welding, EDM, Grinding | Kingsport, TN | MillingTurningLaserWaterjetBendingWeldingEDMGrinding | - |
| Vantage Manufacturing & Assembly LLC Milling, Turning, Laser, Welding, Assembly | Poughkeepsie, NY | MillingTurningLaserWeldingAssembly | - |
| Whi Global, LLC Milling, Turning, Forging, Assembly · ISO 9001, ITAR, NADCAP | Tulsa, OK | MillingTurningForgingAssembly | ISO 9001, ITAR, NADCAP |