| Leister Machine LLC Milling, Welding | Bedford, PA | MillingWelding | - |
| Orbel Corp Stamping, Finishing | Easton, PA | StampingFinishing | - |
| Reuss Industries, Inc Milling, Turning, Waterjet, Welding, EDM, Grinding | Madison, PA | MillingTurningWaterjetWeldingEDMGrinding | - |
| Uber Machining Services LLC Milling, Turning, Finishing | Pittsburgh, PA | MillingTurningFinishing | - |
| Advanced Metals Machining LLC Milling, Finishing | Olyphant, PA | MillingFinishing | - |
| Apex Engineered Products Milling, Turning, Waterjet, Welding, Finishing | Clark, PA | MillingTurningWaterjetWeldingFinishing | - |
| Arkay Solutions Milling, Turning, Welding, Assembly | Feasterville Trevose, PA | MillingTurningWeldingAssembly | - |
| Bec Machine Products Milling, Turning, Welding, Casting | Harleysville, PA | MillingTurningWeldingCasting | - |
| Bridesburg Foundry Company Casting | Whitehall, PA | Casting | - |
| C P Precision Inc Milling, Finishing | Warminster, PA | MillingFinishing | - |
| Corcoran Sheet Metal Bending, Welding | Pittsburgh, PA | BendingWelding | - |
| Dynamic Metal Innovations LLC Laser, Bending, Welding, Finishing, Assembly · ITAR | Emmaus, PA | LaserBendingWeldingFinishingAssembly | ITAR |
| Edge Machine Works Inc Milling | Hatboro, PA | Milling | - |
| Edker Industries LLC Milling, Turning, Laser, Punching, Bending, Welding, Finishing, Assembly | Bala Cynwyd, PA | MillingTurningLaserPunchingBendingWeldingFinishingAssembly | - |
| Exact Machine Service Inc Milling, Turning | York, PA | MillingTurning | - |
| F3 Metalworx Precision Metal Fabrication Bending, Welding | Erie, PA | BendingWelding | - |
| Hegedus Aluminum Industries, Inc Casting, Finishing | Oil City, PA | CastingFinishing | - |
| Insaco Inc Milling, Grinding · ITAR | Quakertown, PA | MillingGrinding | ITAR |
| Jenkins Machine Inc Milling, Turning, EDM, Grinding, Finishing | Bethlehem, PA | MillingTurningEDMGrindingFinishing | - |
| Just One More Part, LLC Bending, Welding, Finishing | Pottstown, PA | BendingWeldingFinishing | - |
| Motive Machine Works LLC Milling, Turning, Stamping, Finishing, Assembly | Lancaster, PA | MillingTurningStampingFinishingAssembly | - |
| Olympus Machining Milling, Turning · ITAR, CMMC | Hanover, PA | MillingTurning | ITAR, CMMC |
| Perry Screw Machine Company Milling, Turning, Bending | Erie, PA | MillingTurningBending | - |
| Perseo-Erie Machine Sales Milling, Laser, EDM, Stamping | Erie, PA | MillingLaserEDMStamping | - |
| Precision Roll Grinders Inc Grinding, Finishing | Allentown, PA | GrindingFinishing | - |
| RJC Manufacturing Services LLC Milling, Turning, Bending, Welding | Irwin, PA | MillingTurningBendingWelding | - |
| SJD Machining, Inc Milling, Turning, EDM, Grinding, Finishing | Meadville, PA | MillingTurningEDMGrindingFinishing | - |
| T-Tygart Industries, Inc Milling, Turning, Bending, Welding, Grinding | Carmichaels, PA | MillingTurningBendingWeldingGrinding | - |
| US Anodize Finishing · NADCAP | Reading, PA | Finishing | NADCAP |
| US Axle, Inc Milling, Forging, Grinding | Pottstown, PA | MillingForgingGrinding | - |
| Anvil Iron Works Welding | Philadelphia, PA | Welding | - |
| Corestar International Corporation Milling, Turning | Irwin, PA | MillingTurning | - |
| Experimental Machine Inc Milling, Waterjet, Welding, Assembly · ISO 9001, AS9100, ITAR, CMMC | New Freedom, PA | MillingWaterjetWeldingAssembly | ISO 9001, AS9100, ITAR, CMMC |
| Great Lakes Metal Finishing Inc Finishing | Erie, PA | Finishing | - |
| H R Edgar Machining & Fabricating, Inc Milling, Turning, Waterjet, Welding · ISO 9001 | New Kensington, PA | MillingTurningWaterjetWelding | ISO 9001 |
| Hennemuth Metal Fabricators Bending, Welding, Waterjet | Oakdale, PA | BendingWeldingWaterjet | - |
| Imperial Carbide Inc Milling, Turning, Welding, Stamping, EDM, Grinding, Finishing · ISO 9001 | Meadville, PA | MillingTurningWeldingStampingEDMGrindingFinishing | ISO 9001 |
| Kelley-Tron Machine Co Milling, Turning | Harrisburg, PA | MillingTurning | - |
| Lamjen Inc Milling, Turning, Welding, Stamping, Casting · ISO 9001 | Erie, PA | MillingTurningWeldingStampingCasting | ISO 9001 |
| M & B Machine, Inc Milling, Turning, Swiss, Welding · ISO 9001, AS9100, CMMC | Carlisle, PA | MillingTurningSwissWelding | ISO 9001, AS9100, CMMC |
| Monarch Valve Corp Milling, Turning, Welding, Grinding, Assembly · ISO 9001 | Aston, PA | MillingTurningWeldingGrindingAssembly | ISO 9001 |
| PBZ Manufacturing Laser, Bending, Welding, Finishing · ISO 9001 | Lititz, PA | LaserBendingWeldingFinishing | ISO 9001 |
| Pennco Tool & Die, Inc Milling, Turning, Welding, Stamping, EDM, Grinding, Finishing · ISO 9001, CMMC | Meadville, PA | MillingTurningWeldingStampingEDMGrindingFinishing | ISO 9001, CMMC |
| Q Company, LLC Milling, Turning, Welding, Grinding, Finishing · ISO 9001, AS9100, ITAR | New Berlin, PA | MillingTurningWeldingGrindingFinishing | ISO 9001, AS9100, ITAR |
| Tri-Form Inc Welding, Assembly · AS9100 | Arnold, PA | WeldingAssembly | AS9100 |
| Chick Machine Company, LLC Milling, Turning, Waterjet, Grinding, Finishing · ISO 9001, AS9100, ITAR | Butler, PA | MillingTurningWaterjetGrindingFinishing | ISO 9001, AS9100, ITAR |
| Clifford CNC Tooling Surgeon, LLC EDM | New Oxford, PA | EDM | - |
| Dixon Tool & Die Co Inc Milling, Turning, Waterjet, Welding, EDM, Grinding · ISO 9001, CMMC | Tyrone, PA | MillingTurningWaterjetWeldingEDMGrinding | ISO 9001, CMMC |
| Erie Plating Co Finishing · ISO 9001, ITAR, NADCAP | Erie, PA | Finishing | ISO 9001, ITAR, NADCAP |
| General Manufacturing Co Milling, Turning, Finishing, Assembly · ISO 9001, ITAR | Bethel Park, PA | MillingTurningFinishingAssembly | ISO 9001, ITAR |