| Bridesburg Foundry Company Casting | Whitehall, PA | Casting | - |
| Charlie Mike Manufacturing LLC Milling, Turning, Laser, Bending, Welding, Stamping, EDM, Finishing | Oakdale, PA | MillingTurningLaserBendingWeldingStampingEDMFinishing | - |
| Compucraft Fabricators Inc Milling, Turning, Laser, Punching, Bending, Welding, Grinding, Finishing · ISO 9001, ITAR | Montgomeryville, PA | MillingTurningLaserPunchingBendingWeldingGrindingFinishing | ISO 9001, ITAR |
| Computer Components Corporation Milling, Turning, Punching, Bending, Welding, Assembly · ISO 9001, ITAR | Philadelphia, PA | MillingTurningPunchingBendingWeldingAssembly | ISO 9001, ITAR |
| Corestar International Corporation Milling, Turning | Irwin, PA | MillingTurning | - |
| Dechert Dynamics Corp Milling, Turning, Welding, Grinding · ISO 9001 | Palmyra, PA | MillingTurningWeldingGrinding | ISO 9001 |
| Edker Industries LLC Milling, Turning, Laser, Punching, Bending, Welding, Finishing, Assembly | Bala Cynwyd, PA | MillingTurningLaserPunchingBendingWeldingFinishingAssembly | - |
| F3 Metalworx Precision Metal Fabrication Bending, Welding | Erie, PA | BendingWelding | - |
| Gamlet Inc Milling, Laser, Bending, Welding, Stamping, Grinding, Finishing | York, PA | MillingLaserBendingWeldingStampingGrindingFinishing | - |
| Golis Machine Incorporated Milling, Turning, EDM · ISO 9001, AS9100, ITAR | Montrose, PA | MillingTurningEDM | ISO 9001, AS9100, ITAR |
| Great Lakes Automation Services Inc Welding, Assembly · ITAR | Mc Kean, PA | WeldingAssembly | ITAR |
| Great Lakes Metal Finishing Inc Finishing | Erie, PA | Finishing | - |
| H & H Machine Product Milling, Turning | Erie, PA | MillingTurning | - |
| Hamill Manufacturing Co Milling, Turning, Welding, EDM · ISO 9001, ITAR | Trafford, PA | MillingTurningWeldingEDM | ISO 9001, ITAR |
| Hegedus Aluminum Industries, Inc Casting, Finishing | Oil City, PA | CastingFinishing | - |
| 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 |
| Industrial Sales & Manufacturing, Inc. Milling, Turning, Bending, Laser, Welding · ISO 9001 | Erie, PA | MillingTurningBendingLaserWelding | ISO 9001 |
| J.W. Steel Fabricating Co. Bending, Welding | Mars, PA | BendingWelding | - |
| Just One More Part, LLC Bending, Welding, Finishing | Pottstown, PA | BendingWeldingFinishing | - |
| Kovlar Precision Manufacturing, Inc Milling | Bedford, PA | Milling | - |
| Liberty Manufacturing LLC Milling | Levittown, PA | Milling | - |
| M & M Sheet Metal, Inc Milling, Laser, Bending, Welding, Forging · ISO 9001, ITAR, CMMC | Williamsport, PA | MillingLaserBendingWeldingForging | ISO 9001, ITAR, CMMC |
| Maverick Machine Co., LLC Milling, Turning · ISO 9001, AS9100, ITAR, CMMC | Tamaqua, PA | MillingTurning | ISO 9001, AS9100, ITAR, CMMC |
| Mission Critical Solutions LLC Milling, Punching, Bending, Welding | Alum Bank, PA | MillingPunchingBendingWelding | - |
| Olympic Tool & Machine Corp Milling, Grinding, Assembly | Aston, PA | MillingGrindingAssembly | - |
| PBZ Manufacturing Laser, Bending, Welding, Finishing · ISO 9001 | Lititz, PA | LaserBendingWeldingFinishing | ISO 9001 |
| Perseo-Erie Machine Sales Milling, Laser, EDM, Stamping | Erie, PA | MillingLaserEDMStamping | - |
| RJC Manufacturing Services LLC Milling, Turning, Bending, Welding | Irwin, PA | MillingTurningBendingWelding | - |
| SJD Machining, Inc Milling, Turning, EDM, Grinding, Finishing | Meadville, PA | MillingTurningEDMGrindingFinishing | - |
| Specialty Roller and Machine Inc Milling, Turning, Grinding | Berwick, PA | MillingTurningGrinding | - |
| Specialty Steel Supply Co., Inc Punching, Bending, Welding | Fairless Hills, PA | PunchingBendingWelding | - |
| Starlite Diversified Inc Milling, Turning, Welding, EDM, Grinding | Meadville, PA | MillingTurningWeldingEDMGrinding | - |
| T-Tygart Industries, Inc Milling, Turning, Bending, Welding, Grinding | Carmichaels, PA | MillingTurningBendingWeldingGrinding | - |
| US Axle, Inc Milling, Forging, Grinding | Pottstown, PA | MillingForgingGrinding | - |
| Zober Industries, Inc Milling, Turning, Welding, EDM, Assembly · ISO 9001, ISO 13485 | Croydon, PA | MillingTurningWeldingEDMAssembly | ISO 9001, ISO 13485 |
| Corcoran Sheet Metal Bending, Welding | Pittsburgh, PA | BendingWelding | - |
| Ash-Tec Laser, Welding, Finishing | Hegins, PA | LaserWeldingFinishing | - |
| C-B Tool Co Milling, Turning, Welding · ISO 9001 | Lancaster, PA | MillingTurningWelding | ISO 9001 |
| Caldwell Corp Milling, Turning, Welding, Grinding | Emporium, PA | MillingTurningWeldingGrinding | - |
| Clark Metal Products Co Milling, Laser, Punching, Bending, Welding, Finishing, Assembly · ISO 9001 | Blairsville, PA | MillingLaserPunchingBendingWeldingFinishingAssembly | ISO 9001 |
| Dacval, LLC Welding, Finishing · ISO 9001, AS9100, ITAR | Philadelphia, PA | WeldingFinishing | ISO 9001, AS9100, ITAR |
| Deval Life Cycle Support LLC Milling, Turning, Welding, Assembly · ISO 9001, AS9100 | Philadelphia, PA | MillingTurningWeldingAssembly | ISO 9001, AS9100 |
| E.H. Schwab Milling, Turning, Laser, Punching, Bending, Welding · ISO 9001 | Turtle Creek, PA | MillingTurningLaserPunchingBendingWelding | ISO 9001 |
| Erie Weld Products Punching, Bending, Welding | Erie, PA | PunchingBendingWelding | - |
| Folsom Tool & Mold Corp Milling, Turning, Waterjet, Welding | Aston, PA | MillingTurningWaterjetWelding | - |
| High Steel Structures LLC Welding | Lancaster, PA | Welding | - |
| Lakeview Forge Co Forging · ITAR | Erie, PA | Forging | ITAR |
| Leiss Tool & Die Co Milling, Turning, Bending, Welding, Stamping, EDM, Grinding | Somerset, PA | MillingTurningBendingWeldingStampingEDMGrinding | - |
| Micro Facture LLC Milling, Turning, EDM, Grinding, Assembly · ISO 9001, ITAR | Lancaster, PA | MillingTurningEDMGrindingAssembly | ISO 9001, ITAR |