| Arrowtech Machine Works Milling, Turning, Grinding | Eugene, OR | MillingTurningGrinding | - |
| Ascend Engineering LLC Milling, Turning, Welding, Grinding, Assembly · ISO 9001 | Largo, FL | MillingTurningWeldingGrindingAssembly | ISO 9001 |
| Ascentec Engineering LLC Milling, Turning, Waterjet, EDM, Grinding | Tualatin, OR | MillingTurningWaterjetEDMGrinding | - |
| Ashore Manufacturing Group LLC Milling, Turning, Stamping, EDM, Grinding · ISO 9001, AS9100, ITAR, CMMC | Berlin Center, OH | MillingTurningStampingEDMGrinding | ISO 9001, AS9100, ITAR, CMMC |
| Auer Precision Stamping Inc Stamping, EDM, Grinding · ISO 13485 | Mesa, AZ | StampingEDMGrinding | ISO 13485 |
| Auto-Turn Acquisition, LLC Milling, Turning, Welding, Stamping, Grinding, Finishing · ISO 9001, AS9100 | Tulsa, OK | MillingTurningWeldingStampingGrindingFinishing | ISO 9001, AS9100 |
| Automated Machine & Technology Inc Milling, Turning, Waterjet, Bending, Welding, EDM, Grinding, Assembly · ISO 9001, ITAR | Yorktown, VA | MillingTurningWaterjetBendingWeldingEDMGrindingAssembly | ISO 9001, ITAR |
| Avans Machine, Inc Milling, Turning, Welding, EDM, Grinding · ISO 9001, AS9100, ISO 13485 | Scottsboro, AL | MillingTurningWeldingEDMGrinding | ISO 9001, AS9100, ISO 13485 |
| Avanti Engineering Inc Milling, Turning, Swiss, EDM, Grinding, Finishing, Assembly · ISO 9001 | Glendale Heights, IL | MillingTurningSwissEDMGrindingFinishingAssembly | ISO 9001 |
| B & D Precision Welding Milling, Turning, Welding, Grinding | Pomona, CA | MillingTurningWeldingGrinding | - |
| B & K Solutions, Inc Laser, Welding, Grinding | Clinton Township, MI | LaserWeldingGrinding | - |
| B Machine Milling, Turning, Welding, Stamping, Grinding | Parkersburg, WV | MillingTurningWeldingStampingGrinding | - |
| B T M Industries Inc Milling, Turning, Welding, Casting, Grinding | Woodstock, IL | MillingTurningWeldingCastingGrinding | - |
| B-Tec Solutions Inc Milling, Turning, Welding, Stamping, EDM, Grinding, Assembly · ISO 9001, AS9100 | Croydon, PA | MillingTurningWeldingStampingEDMGrindingAssembly | ISO 9001, AS9100 |
| Babbitt Bearing Co Inc Welding, Grinding, Finishing | San Jose, CA | WeldingGrindingFinishing | - |
| Ball Industries LLC Milling, Turning, Grinding | Annville, KY | MillingTurningGrinding | - |
| Banks Engineering & Machine LLC Milling, Turning, Welding, Casting, Grinding · ISO 9001 | Webb City, MO | MillingTurningWeldingCastingGrinding | ISO 9001 |
| Banner Metalcraft Inc Milling, Turning, Laser, Punching, Bending, Welding, Stamping, Grinding, Finishing · AS9100 | Ronkonkoma, NY | MillingTurningLaserPunchingBendingWeldingStampingGrindingFinishing | AS9100 |
| Basin Precision Machining LLC Milling, Turning, Grinding · ISO 9001 | Jefferson, WI | MillingTurningGrinding | ISO 9001 |
| Bay State Machine Co Milling, Turning, Grinding, Assembly | Easthampton, MA | MillingTurningGrindingAssembly | - |
| Bci Solutions, Inc Milling, Casting, Grinding, Assembly · ISO 9001, IATF 16949 | Bremen, IN | MillingCastingGrindingAssembly | ISO 9001, IATF 16949 |
| Bear Machinery, Inc Milling, Turning, Waterjet, Bending, Welding, Grinding, Assembly · ISO 9001, ITAR | Kaneohe, HI | MillingTurningWaterjetBendingWeldingGrindingAssembly | ISO 9001, ITAR |
| Bear Ridge Mach & Fab Inc Milling, Laser, Waterjet, Punching, Bending, Welding, Grinding | Frackville, PA | MillingLaserWaterjetPunchingBendingWeldingGrinding | - |
| Belding Tool and Machine Milling, Turning, Welding, EDM, Grinding | Belding, MI | MillingTurningWeldingEDMGrinding | - |
| Bell Machine Co Inc Milling, Turning, Welding, Grinding · ISO 9001 | Shreveport, LA | MillingTurningWeldingGrinding | ISO 9001 |
| Bent River Machine Inc Milling, Turning, Bending, Welding, EDM, Grinding, Finishing, Assembly · ISO 9001 | Clarkdale, AZ | MillingTurningBendingWeldingEDMGrindingFinishingAssembly | ISO 9001 |
| Bent River Tech Milling, Turning, EDM, Grinding | Vancouver, WA | MillingTurningEDMGrinding | - |
| Bermont Gage & Automation Inc Milling, Waterjet, Welding, Grinding · ISO 9001 | Fraser, MI | MillingWaterjetWeldingGrinding | ISO 9001 |
| Bertrand Products, Inc Milling, Turning, Grinding, Finishing · ISO 9001 | South Bend, IN | MillingTurningGrindingFinishing | ISO 9001 |
| Best Machine Inc Milling, Turning, Swiss, Bending, Welding, EDM, Grinding · ISO 9001, ITAR | Fremont, NH | MillingTurningSwissBendingWeldingEDMGrinding | ISO 9001, ITAR |
| Betts Precision, Inc Milling, Turning, EDM, Grinding · AS9100, ISO 13485 | Alsip, IL | MillingTurningEDMGrinding | AS9100, ISO 13485 |
| Billet Industries Inc Milling, Turning, Laser, Welding, EDM, Grinding, Assembly · AS9100 | York, PA | MillingTurningLaserWeldingEDMGrindingAssembly | AS9100 |
| Bob Lewis Machine Company, Inc Milling, Turning, Welding, EDM, Grinding, Finishing · ISO 9001, AS9100 | Gardena, CA | MillingTurningWeldingEDMGrindingFinishing | ISO 9001, AS9100 |
| Boniface Tool & Die Inc Milling, Turning, Waterjet, Stamping, Grinding, Finishing | Dudley, MA | MillingTurningWaterjetStampingGrindingFinishing | - |
| Boulevard Machine & Gear, Inc Milling, Turning, Grinding · ISO 9001, AS9100, ITAR | Westfield, MA | MillingTurningGrinding | ISO 9001, AS9100, ITAR |
| Braun Co. Engineering LLC Milling, Turning, Swiss, Grinding | Signal Hill, CA | MillingTurningSwissGrinding | - |
| Brenk Brothers Inc Milling, Turning, EDM, Grinding | Minneapolis, MN | MillingTurningEDMGrinding | - |
| Brogan Acquisition Holdco LLC Milling, Turning, Grinding · ISO 9001 | Elkhorn, WI | MillingTurningGrinding | ISO 9001 |
| Buckingham Tool Corp Milling, Turning, Welding, Grinding | Livonia, MI | MillingTurningWeldingGrinding | - |
| Burke Precision Machine Company, Incorporated Milling, Turning, Grinding · ISO 9001 | East Granby, CT | MillingTurningGrinding | ISO 9001 |
| Burns Machine Co Milling, Turning, Bending, Welding, Grinding, Assembly · ISO 9001 | Ottawa, IL | MillingTurningBendingWeldingGrindingAssembly | ISO 9001 |
| Burton Industries Inc Milling, Turning, Stamping, Grinding · ISO 9001, AS9100, IATF 16949 | Mentor, OH | MillingTurningStampingGrinding | ISO 9001, AS9100, IATF 16949 |
| C & C Machining, Inc Milling, Turning, EDM, Grinding, Finishing | Hayward, CA | MillingTurningEDMGrindingFinishing | - |
| C&M Precision Tech Milling, Turning, Swiss, Welding, EDM, Grinding, Finishing · ISO 9001, AS9100, ITAR, ISO 13485, CMMC | Hudson, NH | MillingTurningSwissWeldingEDMGrindingFinishing | ISO 9001, AS9100, ITAR, ISO 13485, CMMC |
| C2 Machine, LLC Milling, Turning, EDM, Grinding, Assembly | Joelton, TN | MillingTurningEDMGrindingAssembly | - |
| Cad Enterprises, Inc Milling, Swiss, Waterjet, Welding, EDM, Grinding | Phoenix, AZ | MillingSwissWaterjetWeldingEDMGrinding | - |
| Camco Manufacturing Inc Milling, Turning, Grinding, Finishing · ISO 9001, AS9100 | Sayre, PA | MillingTurningGrindingFinishing | ISO 9001, AS9100 |
| Canady Manufacturing Co Inc Milling, Turning, EDM, Grinding · ISO 9001 | San Fernando, CA | MillingTurningEDMGrinding | ISO 9001 |
| Canyon Run Engineering Technologies Milling, Turning, EDM, Grinding, Assembly | Troy, OH | MillingTurningEDMGrindingAssembly | - |
| Caran Precision Engineering & Manufacturing Corp Milling, Turning, Swiss, Welding, Stamping, EDM, Grinding, Assembly · ISO 9001, IATF 16949 | Brea, CA | MillingTurningSwissWeldingStampingEDMGrindingAssembly | ISO 9001, IATF 16949 |