| Sharp Tool Manufacturing Milling, Turning, Welding · ISO 9001, AS9100, ITAR, CMMC | Ogden, UT | MillingTurningWelding | ISO 9001, AS9100, ITAR, CMMC |
| Sick Fab LLC Milling, Bending, Welding | Las Vegas, NV | MillingBendingWelding | - |
| Slim Haney Machining Inc Milling, Turning, Welding | Tulsa, OK | MillingTurningWelding | - |
| Solvers Manufacturing Turning, Bending, Welding | Springfield, NE | TurningBendingWelding | - |
| Specialty Metal Fabricators Bending, Welding | Portland, OR | BendingWelding | - |
| Spokane Metals Welding | Spokane Valley, WA | Welding | - |
| Spokane Tin & Sheet Iron Works, Inc. Bending, Welding | Spokane, WA | BendingWelding | - |
| Spring Grove Sheet Metal Bending, Laser, Welding | Cincinnati, OH | BendingLaserWelding | - |
| Springs Fabrication, LLC Bending, Welding, Waterjet · ISO 9001, ITAR | Colorado Springs, CO | BendingWeldingWaterjet | ISO 9001, ITAR |
| SRS Fabrication Inc. Milling, Turning, Bending, Welding, Waterjet | North Las Vegas, NV | MillingTurningBendingWeldingWaterjet | - |
| Superior Machine & Tool Milling, Turning, Welding · ISO 9001 | Fort Wayne, IN | MillingTurningWelding | ISO 9001 |
| Superior Pipe Fabricators Welding | Los Angeles, CA | Welding | - |
| Superior Process Solutions Milling, Turning, Bending, Laser, Welding, Metal AM | Springfield, MO | MillingTurningBendingLaserWeldingMetal AM | - |
| Swan Island Sheet Metal Works Turning, Bending, Laser, Welding | Portland, OR | TurningBendingLaserWelding | - |
| Tampa Bay Machining Milling, Turning, Welding, EDM · ISO 9001, AS9100, ITAR | Tampa, FL | MillingTurningWeldingEDM | ISO 9001, AS9100, ITAR |
| Tarman Machine Company, Inc. Welding | Canal Winchester, OH | Welding | - |
| TBC Metalworks Bending, Laser, Welding | Green Bay, WI | BendingLaserWelding | - |
| TCMS Inc Milling, Turning, Welding | Oklahoma City, OK | MillingTurningWelding | - |
| Texas Metal Specialty Co Laser, Welding, Waterjet | Houston, TX | LaserWeldingWaterjet | - |
| Texas Sheet Metal Bending, Welding | San Antonio, TX | BendingWelding | - |
| Theonics Milling, Turning, Bending, Welding, EDM · AS9100, ITAR, ISO 13485 | Huntsville, AL | MillingTurningBendingWeldingEDM | AS9100, ITAR, ISO 13485 |
| Thompson-Mathis Metal Mfg. Bending, Welding | Dallas, TX | BendingWelding | - |
| Thorough Built LLC Bending, Laser, Welding | Chattanooga, TN | BendingLaserWelding | - |
| Tolerance Tool & Engineering Milling, Turning, Welding · ISO 9001, ITAR | Detroit, MI | MillingTurningWelding | ISO 9001, ITAR |
| Toron Manufacturing Milling, Welding | Elkhart, IN | MillingWelding | - |
| Tri Precision Sheetmetal, Inc. Bending, Laser, Welding · ISO 9001, AS9100 | Anaheim, CA | BendingLaserWelding | ISO 9001, AS9100 |
| Tri-Gon Precision, Inc. Milling, Turning, Welding, EDM | Colorado Springs, CO | MillingTurningWeldingEDM | - |
| Tri-V Tool & Manufacturing Co Milling, Turning, Bending, Welding, Waterjet, EDM · ISO 9001 | Omaha, NE | MillingTurningBendingWeldingWaterjetEDM | ISO 9001 |
| Triple E Machine Inc Turning, Laser, Welding, Waterjet, EDM | Appleton, WI | TurningLaserWeldingWaterjetEDM | - |
| TRK Fabrication Milling, Turning, Bending, Welding, Waterjet | Akron, OH | MillingTurningBendingWeldingWaterjet | - |
| True FAB and Powder Turning, Bending, Laser, Welding | Reno, NV | TurningBendingLaserWelding | - |
| Turner Machine Co Inc Milling, Turning, Welding | Tulsa, OK | MillingTurningWelding | - |
| United Grinding & Machine Co Milling, Turning, Bending, Laser, Welding, Waterjet, EDM, Casting · ISO 9001 | Canton, OH | MillingTurningBendingLaserWeldingWaterjetEDMCasting | ISO 9001 |
| United Machine & Tool Milling, Turning, Laser, Welding · ISO 9001 | Goodlettsville, TN | MillingTurningLaserWelding | ISO 9001 |
| United Metal Fabricators Inc Bending, Welding · ISO 9001, ITAR | Cleveland, OH | BendingWelding | ISO 9001, ITAR |
| United Precision Services Milling, Turning, Bending, Welding, Waterjet | Cincinnati, OH | MillingTurningBendingWeldingWaterjet | - |
| Valley Iron Welding | Fresno, CA | Welding | - |
| Valley Metal Works Inc Bending, Laser, Welding | Cincinnati, OH | BendingLaserWelding | - |
| Veco Technologies, Inc. Milling, Turning, Welding, EDM | Fresno, CA | MillingTurningWeldingEDM | - |
| Vulcan Machine Milling, Turning, Bending, Laser, Welding, EDM · ISO 9001, AS9100, ITAR, ISO 13485, CMMC | Tampa, FL | MillingTurningBendingLaserWeldingEDM | ISO 9001, AS9100, ITAR, ISO 13485, CMMC |
| Washington Machine Works Milling, Turning, Bending, Welding · ISO 9001 | Seattle, WA | MillingTurningBendingWelding | ISO 9001 |
| Weisgram Metal Fab Bending, Laser, Welding · ISO 9001 | West Fargo, ND | BendingLaserWelding | ISO 9001 |
| Weld Pro Bending, Welding, Waterjet | Boise, ID | BendingWeldingWaterjet | - |
| Wildman Manufacturing, Inc. Milling, Turning, Bending, Welding | Oklahoma City, OK | MillingTurningBendingWelding | - |
| Willcox Metal Fabricators Welding | San Antonio, TX | Welding | - |
| Wirefab Inc. Bending, Laser, Welding · ISO 9001 | Worcester, MA | BendingLaserWelding | ISO 9001 |
| Woodland Manufacturing Welding | Meridian, ID | Welding | - |
| Woody's Sheet Metal Bending, Welding | Boise, ID | BendingWelding | - |
| Xymat Milling, Turning, Bending, Laser, Welding, Waterjet, EDM, Metal AM · ISO 9001, AS9100 | Colorado Springs, CO | MillingTurningBendingLaserWeldingWaterjetEDMMetal AM | ISO 9001, AS9100 |
| Yarder Manufacturing Bending, Laser, Welding, Metal AM · ISO 9001 | Toledo, OH | BendingLaserWeldingMetal AM | ISO 9001 |