| Leonard Machine Co, LLC Milling, Turning, Welding · ISO 9001 | Cookeville, TN | MillingTurningWelding | ISO 9001 |
| THR Machinery Milling, Turning, Bending, Welding | Allons, TN | MillingTurningBendingWelding | - |
| United Machine & Tool Milling, Turning, Laser, Welding · ISO 9001 | Goodlettsville, TN | MillingTurningLaserWelding | ISO 9001 |
| Wright Tool & Engineering Inc Milling, Turning, Bending, Welding, EDM, Grinding, Assembly · ISO 9001 | Piney Flats, TN | MillingTurningBendingWeldingEDMGrindingAssembly | ISO 9001 |
| Ben Parker Company Bending, Laser, Welding, Waterjet | Chattanooga, TN | BendingLaserWeldingWaterjet | - |
| Colbert Manufacturing Co Inc Milling, Turning, Welding, Grinding, Finishing | La Vergne, TN | MillingTurningWeldingGrindingFinishing | - |
| Fab Metal, L.L.C Milling, Turning, Laser, Bending, Welding, Stamping, Finishing, Assembly | Clinton, TN | MillingTurningLaserBendingWeldingStampingFinishingAssembly | - |
| Hamilton Machine Co. Milling, Turning, Bending, Welding | Nashville, TN | MillingTurningBendingWelding | - |
| Metco Metal Fab. Bending, Laser, Welding | Chattanooga, TN | BendingLaserWelding | - |
| Nuclear Lead Co, Inc Welding, Casting | Oak Ridge, TN | WeldingCasting | - |
| Thorough Built LLC Bending, Laser, Welding | Chattanooga, TN | BendingLaserWelding | - |
| 865fablab Laser, Bending | Powell, TN | LaserBending | - |
| C2 Machine, LLC Milling, Turning, EDM, Grinding, Assembly | Joelton, TN | MillingTurningEDMGrindingAssembly | - |
| Fab Worx Milling, Finishing | Mount Juliet, TN | MillingFinishing | - |
| Oak Ridge Tool-Engineering Inc Milling, Turning, Welding, EDM, Grinding | Oak Ridge, TN | MillingTurningWeldingEDMGrinding | - |
| The Gage Lab LLC Grinding | Jefferson City, TN | Grinding | - |
| True Cut Turning, Finishing | Lexington, TN | TurningFinishing | - |
| Alliance Machine and Fabrication, LLC Milling, Turning | Ashland City, TN | MillingTurning | - |
| Cumberland Machine Co Milling, Turning, Welding | Nashville, TN | MillingTurningWelding | - |
| Haney Manufacturing LLC Milling | Kingston, TN | Milling | - |