| Fastech Precision LLC Milling, Turning, Laser, Waterjet, Bending, Welding · ITAR, CMMC | Bedford, IN | MillingTurningLaserWaterjetBendingWelding | ITAR, CMMC |
| Flare Precision LLC Milling, Bending | Fort Wayne, IN | MillingBending | - |
| GCG Industries Inc Milling, Turning · ISO 9001, AS9100, ISO 13485 | Fort Wayne, IN | MillingTurning | ISO 9001, AS9100, ISO 13485 |
| Hamblen Machine Inc Milling, Turning, EDM, Grinding | Bloomington, IN | MillingTurningEDMGrinding | - |
| Hammer MetalWerks Bending, Laser, Welding | Indianapolis, IN | BendingLaserWelding | - |
| Hand Industries Inc Grinding · ISO 9001, AS9100 | Warsaw, IN | Grinding | ISO 9001, AS9100 |
| Holbrook Laser, Welding | Franklin, IN | LaserWelding | - |
| Indy Cast Alloys, Inc Casting | Indianapolis, IN | Casting | - |
| Issi Engineering and Machining, LLC Grinding · ISO 9001 | Evansville, IN | Grinding | ISO 9001 |
| JMS Machine, Inc Milling, Turning, EDM, Grinding | Columbia City, IN | MillingTurningEDMGrinding | - |
| K & K Inc Milling, Casting | Elkhart, IN | MillingCasting | - |
| Kammerer Dynamics Inc Laser, Bending, Welding, Casting, Finishing, Assembly | Kendallville, IN | LaserBendingWeldingCastingFinishingAssembly | - |
| Kamprecision Fabrication LLC Welding | Scottsburg, IN | Welding | - |
| Kent Machine Milling, EDM, Grinding | Indianapolis, IN | MillingEDMGrinding | - |
| Kihm Metal Technologies Laser, Welding | Brazil, IN | LaserWelding | - |
| Kilgore Manufacturing Co Inc Milling, Swiss, Bending, Welding, EDM, Finishing, Assembly · ISO 9001, ITAR | Columbia City, IN | MillingSwissBendingWeldingEDMFinishingAssembly | ISO 9001, ITAR |
| Kimura Foundry America, Inc Casting, Metal AM | Shelbyville, IN | CastingMetal AM | - |
| Krukemeier Machine Milling, Turning, EDM · AS9100, NADCAP | Indianapolis, IN | MillingTurningEDM | AS9100, NADCAP |
| Lyntech Engineering Inc Milling, Turning, Swiss | Rochester, IN | MillingTurningSwiss | - |
| M.a. Metal Co., Inc Laser, Bending, Welding, Stamping, Assembly · ISO 9001 | Columbus, IN | LaserBendingWeldingStampingAssembly | ISO 9001 |
| Major Tool & Machine Milling, Turning, Welding · ISO 9001, AS9100, NADCAP | Indianapolis, IN | MillingTurningWelding | ISO 9001, AS9100, NADCAP |
| Melting Point Metalworks LLC Laser, Bending, Welding | Brownsburg, IN | LaserBendingWelding | - |
| Mercer Machine Company, Inc Milling, Turning, EDM · AS9100 | Camby, IN | MillingTurningEDM | AS9100 |
| Metal Fabricators Plus LLC Laser, Waterjet, Bending, Welding | Indianapolis, IN | LaserWaterjetBendingWelding | - |
| Midwest Industrial Metal Fabrication Inc Milling, Turning, Punching, Bending, Welding, Stamping, Finishing | Huntington, IN | MillingTurningPunchingBendingWeldingStampingFinishing | - |
| Mofab Inc Milling, Laser, Waterjet, Bending, Welding | Anderson, IN | MillingLaserWaterjetBendingWelding | - |
| Morehead Machinery Inc Milling, Turning, Welding, EDM, Grinding | Elkhart, IN | MillingTurningWeldingEDMGrinding | - |
| MSP Maufacturing Milling, Turning, Bending, Welding, Finishing, Assembly | Bloomington, IN | MillingTurningBendingWeldingFinishingAssembly | - |
| O&R Precision Milling, Turning, Swiss, Stamping, EDM, Grinding · ISO 9001 | Berne, IN | MillingTurningSwissStampingEDMGrinding | ISO 9001 |
| Ottenweller Company, Inc. Bending, Laser, Welding · ISO 9001 | Fort Wayne, IN | BendingLaserWelding | ISO 9001 |
| Parametric Machining Incorporated Milling, Turning, EDM, Grinding · ISO 9001, ISO 13485 | Huntertown, IN | MillingTurningEDMGrinding | ISO 9001, ISO 13485 |
| Precision Fabrication, Inc. Milling, Bending, Laser, Welding, Waterjet | Fort Wayne, IN | MillingBendingLaserWeldingWaterjet | - |
| Quake Manufacturing Inc Milling, Turning, Welding | Fort Wayne, IN | MillingTurningWelding | - |
| Rathburn Precision Machining Milling, Turning, Swiss, EDM | Auburn, IN | MillingTurningSwissEDM | - |
| Refax Inc Welding | Gary, IN | Welding | - |
| RPM Tool Waterjet, Stamping | Princeton, IN | WaterjetStamping | - |
| Siddhi Integrated Manufacturing Services Inc Milling, Turning, Swiss, Stamping, EDM · ISO 9001, ITAR | Clarksville, IN | MillingTurningSwissStampingEDM | ISO 9001, ITAR |
| South Bend Form Tool Co Milling, Turning, EDM | South Bend, IN | MillingTurningEDM | - |
| Specialty Tool & Die Company Inc Milling, Turning, Bending, Welding, Stamping, Grinding, Assembly | Kokomo, IN | MillingTurningBendingWeldingStampingGrindingAssembly | - |
| Standard Locknut, LLC Milling, Turning | Westfield, IN | MillingTurning | - |
| Statt Engineering LLC Milling, Stamping · AS9100, ITAR | Martinsville, IN | MillingStamping | AS9100, ITAR |
| Steel House Bending, Welding | Indianapolis, IN | BendingWelding | - |
| Summit City Precision Machining LLC Milling, Turning, EDM · ISO 9001 | Fort Wayne, IN | MillingTurningEDM | ISO 9001 |
| Superior Machine & Tool Milling, Turning, Welding · ISO 9001 | Fort Wayne, IN | MillingTurningWelding | ISO 9001 |
| Swiss Labs Machine and Engineering, Inc Milling, Turning, Swiss, Finishing · ISO 9001 | Franklin, IN | MillingTurningSwissFinishing | ISO 9001 |
| The Progress Group, Inc Turning, Welding, Assembly · ISO 9001 | Schererville, IN | TurningWeldingAssembly | ISO 9001 |
| Toolcraft LLC Milling | Fort Wayne, IN | Milling | - |
| Toron Manufacturing Milling, Welding | Elkhart, IN | MillingWelding | - |
| Touchdown Machining Inc Milling, Turning | Columbus, IN | MillingTurning | - |
| Walerko Tool & Engineering Milling, Turning, Casting · ISO 9001, AS9100 | Elkhart, IN | MillingTurningCasting | ISO 9001, AS9100 |