| E & M Machine, Inc Milling, Turning, Welding, EDM, Finishing | Grantsburg, WI | MillingTurningWeldingEDMFinishing | - |
| Etek Tool & Manufacturing LLC Milling, Turning, Swiss, Welding, Finishing, Assembly · ISO 9001 | Cedarburg, WI | MillingTurningSwissWeldingFinishingAssembly | ISO 9001 |
| Evergreen Tool Company Inc Milling, Turning, Swiss | Peshtigo, WI | MillingTurningSwiss | - |
| Evers Manufacturing Inc Bending, Welding | Milwaukee, WI | BendingWelding | - |
| Fabrifast LLC Laser, Punching, Bending, Welding, Stamping, Finishing | Hartford, WI | LaserPunchingBendingWeldingStampingFinishing | - |
| Fox Valley Metal Fab, Inc. Milling, Bending, Welding | Appleton, WI | MillingBendingWelding | - |
| Fox Valley Tool & Die Inc Milling, Turning, Waterjet, Stamping, EDM, Grinding | Kaukauna, WI | MillingTurningWaterjetStampingEDMGrinding | - |
| Global Precision Group LLC Turning, Welding, Finishing · ISO 9001 | Muskego, WI | TurningWeldingFinishing | ISO 9001 |
| Gromax Precision Die & Mfg., Inc Punching, Bending, Welding, Stamping, EDM, Grinding, Finishing, Assembly · ISO 9001, ITAR | Germantown, WI | PunchingBendingWeldingStampingEDMGrindingFinishingAssembly | ISO 9001, ITAR |
| H & M Machine Inc Milling, Turning, Welding, Stamping, EDM, Grinding, Finishing | Greendale, WI | MillingTurningWeldingStampingEDMGrindingFinishing | - |
| Hastreiter Industries Corp Milling, Turning, Laser, Bending, Welding, Grinding, Finishing · ISO 9001, ITAR | Marshfield, WI | MillingTurningLaserBendingWeldingGrindingFinishing | ISO 9001, ITAR |
| Heckel Tool & Manufacturing Corp EDM, Grinding, Finishing | Eagle, WI | EDMGrindingFinishing | - |
| Herker Industries Inc Milling, Turning, Swiss, Welding, Assembly · ISO 9001 | Menomonee Falls, WI | MillingTurningSwissWeldingAssembly | ISO 9001 |
| HTT, Inc Laser, Welding, Stamping, EDM, Grinding, Finishing | Sheboygan, WI | LaserWeldingStampingEDMGrindingFinishing | - |
| JG Innovations, Inc Finishing | Janesville, WI | Finishing | - |
| Johnson Brass & Machine Foundry Inc Casting, Finishing | Saukville, WI | CastingFinishing | - |
| Just In Time Machine Corp Milling, Turning, Welding · AS9100, ITAR | Middleton, WI | MillingTurningWelding | AS9100, ITAR |
| KLH Industries Inc Milling, Turning, Waterjet, Bending, Welding, EDM, Grinding, Finishing · ISO 9001, AS9100, ITAR, NADCAP | Germantown, WI | MillingTurningWaterjetBendingWeldingEDMGrindingFinishing | ISO 9001, AS9100, ITAR, NADCAP |
| KLM Machining, Inc Milling, Turning, Welding, Finishing | Sussex, WI | MillingTurningWeldingFinishing | - |
| KSM Industries Inc Bending, Welding, Assembly | Germantown, WI | BendingWeldingAssembly | - |
| Latitude Corp Milling, Waterjet, Punching, Bending, Welding, Stamping, Grinding, Finishing · AS9100 | Verona, WI | MillingWaterjetPunchingBendingWeldingStampingGrindingFinishing | AS9100 |
| Lemke Industrial Machine LLC Welding, Grinding | Marathon, WI | WeldingGrinding | - |
| Lindor Tool, Inc Milling, Turning, Welding, Casting, Grinding | Saint Croix Falls, WI | MillingTurningWeldingCastingGrinding | - |
| Mac-Tech Turning, Bending, Laser, Welding | Milwaukee, WI | TurningBendingLaserWelding | - |
| Machine Service Inc Welding · ISO 9001 | Green Bay, WI | Welding | ISO 9001 |
| Machining Concepts LLC Milling, Turning, Swiss, Assembly · ISO 9001, NADCAP | Germantown, WI | MillingTurningSwissAssembly | ISO 9001, NADCAP |
| Marinette Machine LLC Turning, Welding, Grinding, Finishing | Marinette, WI | TurningWeldingGrindingFinishing | - |
| Marsan Inc Bending, Welding, Assembly · ISO 9001 | Germantown, WI | BendingWeldingAssembly | ISO 9001 |
| Mat-Tech Machining Milling, Turning, Welding | Milwaukee, WI | MillingTurningWelding | - |
| McCormick Industries Inc Milling, Turning, Swiss, Welding, Grinding, Finishing, Assembly · ISO 9001 | Appleton, WI | MillingTurningSwissWeldingGrindingFinishingAssembly | ISO 9001 |
| Mitotec Precision, Inc Milling, Turning, Swiss, Assembly · ISO 9001 | Necedah, WI | MillingTurningSwissAssembly | ISO 9001 |
| Moria Manufacturing LLC Milling, Turning, Finishing | Monona, WI | MillingTurningFinishing | - |
| MRC Machine Inc Milling, Turning, Welding | Pound, WI | MillingTurningWelding | - |
| National Technologies, Inc Milling, Turning, Swiss, Grinding | Oak Creek, WI | MillingTurningSwissGrinding | - |
| Northern Gear, LLC Casting, Finishing | Muskego, WI | CastingFinishing | - |
| OMS Precision Machining Milling, Turning, Swiss, Casting, Grinding, Finishing · ISO 9001, ITAR | Oshkosh, WI | MillingTurningSwissCastingGrindingFinishing | ISO 9001, ITAR |
| PDJ Cutting and Fabricating LLC Bending, Welding | Manitowoc, WI | BendingWelding | - |
| Pioneer Products, Inc Milling, Turning, Casting, Grinding, Finishing, Assembly | Racine, WI | MillingTurningCastingGrindingFinishingAssembly | - |
| Pmi LLC Laser, Punching, Bending, Welding, Stamping, Assembly | Bloomer, WI | LaserPunchingBendingWeldingStampingAssembly | - |
| Prototek Digital ManufacturingVerified Milling, Turning, Laser, Waterjet, Bending, Welding, EDM, Finishing, Assembly · ISO 9001, AS9100, ITAR, NADCAP, CMMC | Menomonie, WI | MillingTurningLaserWaterjetBendingWeldingEDMFinishingAssembly | ISO 9001, AS9100, ITAR, NADCAP, CMMC |
| Ram Tool Inc Milling, Turning, Welding, Casting, EDM, Grinding · ISO 9001, ITAR | Grafton, WI | MillingTurningWeldingCastingEDMGrinding | ISO 9001, ITAR |
| Rapid Manufacturing Company, LLC Welding, Metal AM, EDM · ISO 9001, ITAR | Eau Claire, WI | WeldingMetal AMEDM | ISO 9001, ITAR |
| RB Industrial Manufacturer LLC Milling, Swiss, Grinding | Racine, WI | MillingSwissGrinding | - |
| Reader Precision Solutions, Inc Milling, Turning, Swiss | Elkhorn, WI | MillingTurningSwiss | - |
| Reich Tool & Design Inc Milling, Turning, Swiss, Waterjet, Welding, Stamping, EDM, Finishing · ISO 9001, AS9100, ITAR, ISO 13485 | Menomonee Falls, WI | MillingTurningSwissWaterjetWeldingStampingEDMFinishing | ISO 9001, AS9100, ITAR, ISO 13485 |
| Sulzer Machine & Manufacturing Inc Milling, Welding, Grinding · ISO 9001 | Mosinee, WI | MillingWeldingGrinding | ISO 9001 |
| Superior Grinding Corp Milling, Turning, Grinding, Finishing | Antigo, WI | MillingTurningGrindingFinishing | - |
| Synergy Manufacturing Services LLC Welding, Assembly | Grafton, WI | WeldingAssembly | - |
| Target Marketing Associates, Inc Welding | Sturgeon Bay, WI | Welding | - |
| TMS Inc Milling, Laser, Punching, Bending, Welding, Grinding, Finishing, Assembly | New Berlin, WI | MillingLaserPunchingBendingWeldingGrindingFinishingAssembly | - |