| Zike Industries LLC Milling, Turning, Laser, Welding, Finishing | Tolland, CT | MillingTurningLaserWeldingFinishing | - |
| A B & F Sheet Metal Products Inc Milling, Turning, Waterjet, Bending, Welding, Finishing · AS9100, ITAR | Cheshire, CT | MillingTurningWaterjetBendingWeldingFinishing | AS9100, ITAR |
| Accu-Tek Engineering, Inc Milling, Turning, Grinding | Plantsville, CT | MillingTurningGrinding | - |
| Advanced Manufacturing LLC Welding, Stamping | Windsor, CT | WeldingStamping | - |
| Alinabal Laser, Waterjet, Bending, Welding, Stamping, EDM, Grinding, Assembly | Milford, CT | LaserWaterjetBendingWeldingStampingEDMGrindingAssembly | - |
| Apm Machine LLC Milling, Turning | Plainville, CT | MillingTurning | - |
| Aurora Advanced Manufacturing LLC Milling, Turning | Rocky Hill, CT | MillingTurning | - |
| Bmi Cad Services, Inc Milling, Turning, Welding, EDM, Grinding | Simsbury, CT | MillingTurningWeldingEDMGrinding | - |
| C.V. Industries Milling, Turning, EDM | Southington, CT | MillingTurningEDM | - |
| Century Tool Co Inc Milling, Turning, Welding, EDM, Grinding | Thompson, CT | MillingTurningWeldingEDMGrinding | - |
| Dawid Manufacturing Inc Milling, Welding | Ansonia, CT | MillingWelding | - |
| Malux Machine LLC Milling, Turning, Welding, Grinding | Stratford, CT | MillingTurningWeldingGrinding | - |
| Marion Manufacturing Co Inc Milling, Turning, Laser, Stamping, EDM | Cheshire, CT | MillingTurningLaserStampingEDM | - |
| Metal Industries, Inc Milling, Turning, Welding | Hartford, CT | MillingTurningWelding | - |
| N.C.T., Inc Milling, Turning, Swiss, Welding, Grinding | Colchester,, CT | MillingTurningSwissWeldingGrinding | - |
| National Chromium Finishing | Putnam, CT | Finishing | - |
| New England CNC, Inc Milling, Finishing | Hamden, CT | MillingFinishing | - |
| Newhart Products II Inc Waterjet, Stamping | Milford, CT | WaterjetStamping | - |
| QSR Steel Corporation Welding | Hartford, CT | Welding | - |
| Sunnycor Inc Milling, Turning, Grinding, Assembly · AS9100, ITAR | Torrington, CT | MillingTurningGrindingAssembly | AS9100, ITAR |
| Troy Industrial Milling | Ansonia, CT | Milling | - |
| U.t.r. Engineering Works Ltd. Liability Co Welding | Norfolk, CT | Welding | - |
| Valley Tool and Manufacturing LLC Milling, Turning, Waterjet, Bending, Welding, EDM, Assembly · NADCAP | Milford, CT | MillingTurningWaterjetBendingWeldingEDMAssembly | NADCAP |
| Yankee Casting Co, Inc Milling, Welding, Casting · AS9100, NADCAP | Enfield, CT | MillingWeldingCasting | AS9100, NADCAP |