| Toolrite Mfg Co., Inc Turning, Grinding | New Berlin, WI | TurningGrinding | - |
| Top Line Engineering LLC Milling, Turning, Laser, Waterjet, Welding, Grinding | Holland, MI | MillingTurningLaserWaterjetWeldingGrinding | - |
| Total Manufacturing Milling, Turning, Waterjet, Welding, EDM, Grinding | Mentor, OH | MillingTurningWaterjetWeldingEDMGrinding | - |
| Trabuco Precision LLC Milling, Turning, Grinding · ISO 9001, AS9100 | Yorba Linda, CA | MillingTurningGrinding | ISO 9001, AS9100 |
| Tram-Tek, Inc Milling, Turning, EDM, Grinding · ISO 9001, AS9100 | Phoenix, AZ | MillingTurningEDMGrinding | ISO 9001, AS9100 |
| Transfer USA Milling, Turning, Grinding | Knoxville, TN | MillingTurningGrinding | - |
| Tri Angle Metal Fab Milling, Turning, Laser, Punching, Bending, Welding, EDM, Grinding, Assembly · NADCAP | Milton, VT | MillingTurningLaserPunchingBendingWeldingEDMGrindingAssembly | NADCAP |
| Tri Fab Associates, Inc Milling, Turning, Laser, Punching, Welding, Stamping, Grinding, Finishing, Assembly · ISO 9001, AS9100, ITAR, CMMC | Fremont, CA | MillingTurningLaserPunchingWeldingStampingGrindingFinishingAssembly | ISO 9001, AS9100, ITAR, CMMC |
| Tri-County Precision Grinding Inc Milling, Grinding | Warren, MI | MillingGrinding | - |
| Tri-State Tool Grinding Incorporated Milling, Grinding · ISO 9001 | Cincinnati, OH | MillingGrinding | ISO 9001 |
| Triad Tool & Die Co Milling, Turning, Waterjet, Welding, EDM, Grinding, Finishing, Assembly · ISO 9001, AS9100, NADCAP | Somerville, NJ | MillingTurningWaterjetWeldingEDMGrindingFinishingAssembly | ISO 9001, AS9100, NADCAP |
| Triangle Engineering Corp Milling, Turning, Grinding · ISO 9001, AS9100 | Indianapolis, IN | MillingTurningGrinding | ISO 9001, AS9100 |
| Tridecs Corp Milling, Swiss, EDM, Grinding, Finishing, Assembly · ISO 9001 | Hayward, CA | MillingSwissEDMGrindingFinishingAssembly | ISO 9001 |
| Trilap Precision Finishing, LLC Grinding · ITAR | Lowell, MA | Grinding | ITAR |
| Trinity Machining, LLC Milling, Turning, Bending, EDM, Grinding, Finishing · ISO 9001 | Grass Valley, CA | MillingTurningBendingEDMGrindingFinishing | ISO 9001 |
| Trio Metal Stamping, Inc Milling, Turning, Laser, Bending, Welding, Stamping, EDM, Grinding · ISO 9001, NADCAP | City Of Industry, CA | MillingTurningLaserBendingWeldingStampingEDMGrinding | ISO 9001, NADCAP |
| Triplex Industries Inc Turning, Welding, Stamping, EDM, Grinding, Assembly · ITAR | Rochester, NY | TurningWeldingStampingEDMGrindingAssembly | ITAR |
| Troy Innovative Instruments, Inc Milling, Turning, Swiss, Laser, Welding, EDM, Grinding, Finishing, Assembly · ISO 9001, ITAR, ISO 13485 | Middlefield, OH | MillingTurningSwissLaserWeldingEDMGrindingFinishingAssembly | ISO 9001, ITAR, ISO 13485 |
| Troy Thompson Inc Milling, Turning, Welding, Grinding | Brooksville, FL | MillingTurningWeldingGrinding | - |
| Tru Form Precision Manufacturing Milling, Turning, Welding, EDM, Grinding, Finishing, Assembly · ISO 9001, ITAR, ISO 13485 | Plaistow, NH | MillingTurningWeldingEDMGrindingFinishingAssembly | ISO 9001, ITAR, ISO 13485 |
| True Precision Machining, Inc Milling, Turning, Swiss, Welding, Stamping, EDM, Grinding, Finishing · ISO 9001, AS9100, ITAR, CMMC | Buellton, CA | MillingTurningSwissWeldingStampingEDMGrindingFinishing | ISO 9001, AS9100, ITAR, CMMC |
| Trust Manufacturing LLC Milling, Turning, Waterjet, Bending, Forging, EDM, Grinding, Finishing | Euclid, OH | MillingTurningWaterjetBendingForgingEDMGrindingFinishing | - |
| Trutron LLC Milling, Turning, EDM, Grinding | Troy, MI | MillingTurningEDMGrinding | - |
| Turntec Manufacturing Milling, Turning, Welding, Grinding | Mills, WY | MillingTurningWeldingGrinding | - |
| Two M Precision Co. Inc Milling, Grinding, Finishing · ISO 9001 | Willoughby, OH | MillingGrindingFinishing | ISO 9001 |
| U.m.c., Inc Milling, Turning, Welding, Stamping, EDM, Grinding, Finishing · ISO 9001, ITAR, ISO 13485 | Monticello, MN | MillingTurningWeldingStampingEDMGrindingFinishing | ISO 9001, ITAR, ISO 13485 |
| U.S. Chrome Corporation of Ohio Grinding, Finishing · ISO 9001, NADCAP | Dayton, OH | GrindingFinishing | ISO 9001, NADCAP |
| Ultimate Manufacturing, Inc Milling, Turning, Grinding | Oakland Park, FL | MillingTurningGrinding | - |
| Ultra-Tech Aerospace, Inc Milling, Welding, EDM, Grinding, Assembly · ISO 9001, AS9100, NADCAP | Kansas City, KS | MillingWeldingEDMGrindingAssembly | ISO 9001, AS9100, NADCAP |
| Unique Model Inc Milling, Turning, Welding, EDM, Grinding | Grand Rapids, MI | MillingTurningWeldingEDMGrinding | - |
| Unique Tool and Manufacturing Co Milling, EDM, Grinding · ISO 9001, AS9100 | Franklinville, NC | MillingEDMGrinding | ISO 9001, AS9100 |
| United Agriculture & Manufacturing, LLC Milling, Turning, Grinding | Aurora, NE | MillingTurningGrinding | - |
| United CNC Machining Milling, Turning, Laser, Waterjet, Welding, EDM, Grinding, Finishing · ISO 9001, AS9100, ITAR, NADCAP, CMMC | Auburn Hills, MI | MillingTurningLaserWaterjetWeldingEDMGrindingFinishing | ISO 9001, AS9100, ITAR, NADCAP, CMMC |
| United Machine & Metal Fab Inc Milling, Turning, EDM, Grinding | Conover, NC | MillingTurningEDMGrinding | - |
| United Plating Works, Inc Grinding, Finishing · NADCAP | Tulsa, OK | GrindingFinishing | NADCAP |
| United Standard Industries Inc Milling, Turning, Welding, Grinding, Finishing · ISO 9001, AS9100 | Glenview, IL | MillingTurningWeldingGrindingFinishing | ISO 9001, AS9100 |
| Universal Compressor Solutions, LLC Welding, Grinding | Mayfield, KY | WeldingGrinding | - |
| Universal Machine & Design Corporation Milling, Grinding | Fitchburg, MA | MillingGrinding | - |
| Universal Machine & Tool, Inc Milling, Turning, Laser, Waterjet, Bending, Welding, EDM, Grinding | Kingsport, TN | MillingTurningLaserWaterjetBendingWeldingEDMGrinding | - |
| US Aluminum Castings Milling, Turning, Casting, Grinding, Finishing, Assembly · ISO 9001, ITAR, NADCAP, IATF 16949 | Entiat, WA | MillingTurningCastingGrindingFinishingAssembly | ISO 9001, ITAR, NADCAP, IATF 16949 |
| US Axle, Inc Milling, Forging, Grinding | Pottstown, PA | MillingForgingGrinding | - |
| V.e.p. Manufacturing Inc Milling, Turning, Welding, Grinding · ISO 9001 | Jackson, NJ | MillingTurningWeldingGrinding | ISO 9001 |
| V&G Dynamic Machine, LLC Milling, Turning, Grinding, Finishing, Assembly · ISO 9001, ITAR | Marble Falls, TX | MillingTurningGrindingFinishingAssembly | ISO 9001, ITAR |
| V&S Engineering Milling, Turning, EDM, Grinding · ISO 9001, AS9100, ITAR | Huntington Beach, CA | MillingTurningEDMGrinding | ISO 9001, AS9100, ITAR |
| Valence Precision LLC Milling, Turning, Laser, Waterjet, Bending, Welding, Grinding | Richmond, CA | MillingTurningLaserWaterjetBendingWeldingGrinding | - |
| Valley Machining Co Milling, Turning, Welding, Grinding · ISO 9001, ITAR | Rock Valley, IA | MillingTurningWeldingGrinding | ISO 9001, ITAR |
| Van - Wal Machine, Inc Milling, Turning, Grinding | Bellingham, MA | MillingTurningGrinding | - |
| Vanermen Smith Products Inc Milling, Turning, Waterjet, Bending, Welding, Grinding, Assembly · ISO 9001 | Lansing, MI | MillingTurningWaterjetBendingWeldingGrindingAssembly | ISO 9001 |
| Vargo Tool & Die Inc Milling, Turning, Welding, Grinding · ISO 9001, AS9100 | Marinette, WI | MillingTurningWeldingGrinding | ISO 9001, AS9100 |
| Vector Technologies, Inc Milling, Waterjet, Welding, Grinding · ISO 9001, AS9100, ITAR | Winfield, KS | MillingWaterjetWeldingGrinding | ISO 9001, AS9100, ITAR |