| Skillcraft Machine Tool Co Inc Milling, Turning, Welding | South Windsor, CT | MillingTurningWelding | - |
| Straitek, LLC Milling, Bending, Finishing · ITAR, ISO 13485 | Danbury, CT | MillingBendingFinishing | ITAR, ISO 13485 |
| 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 |
| Vector Manufacturing LLC Milling, Turning, Waterjet | Stafford Springs, CT | MillingTurningWaterjet | - |
| Yankee Casting Co, Inc Milling, Welding, Casting · AS9100, NADCAP | Enfield, CT | MillingWeldingCasting | AS9100, NADCAP |
| Allied Machining Co., Inc Milling, Turning, Welding, EDM, Grinding, Finishing, Assembly | Newington, CT | MillingTurningWeldingEDMGrindingFinishingAssembly | - |
| Alpha Q, Inc Milling, Grinding · ISO 9001, AS9100 | Colchester, CT | MillingGrinding | ISO 9001, AS9100 |
| Atlantic Fabricating Milling, Turning, Punching, Bending, Welding, Assembly · ISO 9001 | East Granby, CT | MillingTurningPunchingBendingWeldingAssembly | ISO 9001 |
| K4 Machining LLC Milling, Turning · ISO 9001, AS9100 | Waterbury, CT | MillingTurning | ISO 9001, AS9100 |
| LM Gill Welding & Manufacturing LLC Milling, Welding · ISO 9001, AS9100, ITAR, NADCAP | Manchester, CT | MillingWelding | ISO 9001, AS9100, ITAR, NADCAP |
| Quality Engineering Services Inc Milling, Turning, Welding, EDM, Grinding · ISO 9001, ITAR | Wallingford, CT | MillingTurningWeldingEDMGrinding | ISO 9001, ITAR |
| T.P. Engineering Inc Milling, Turning, Swiss, Welding, Grinding, Assembly · ISO 9001, ITAR, ISO 13485 | Danbury, CT | MillingTurningSwissWeldingGrindingAssembly | ISO 9001, ITAR, ISO 13485 |
| New England CNC, Inc Milling, Finishing | Hamden, CT | MillingFinishing | - |
| Zike Industries LLC Milling, Turning, Laser, Welding, Finishing | Tolland, CT | MillingTurningLaserWeldingFinishing | - |
| 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 | - |
| Bmi Cad Services, Inc Milling, Turning, Welding, EDM, Grinding | Simsbury, CT | MillingTurningWeldingEDMGrinding | - |
| C.V. Industries Milling, Turning, EDM | Southington, CT | MillingTurningEDM | - |
| CAMM Metals, Inc. Bending, Laser, Welding, Waterjet, Metal AM | East Windsor, CT | BendingLaserWeldingWaterjetMetal AM | - |
| Dawid Manufacturing Inc Milling, Welding | Ansonia, CT | MillingWelding | - |
| Griffin Welding LLC Welding | Waterbury, CT | Welding | - |
| Malux Machine LLC Milling, Turning, Welding, Grinding | Stratford, CT | MillingTurningWeldingGrinding | - |
| Metal Industries, Inc Milling, Turning, Welding | Hartford, CT | MillingTurningWelding | - |
| N.C.T., Inc Milling, Turning, Swiss, Welding, Grinding | Colchester,, CT | MillingTurningSwissWeldingGrinding | - |
| U.S. Fabricating LLC Assembly | Naugatuck, CT | Assembly | - |