| Astro Machine & Tool Work Milling, Turning, Finishing | Tyler, TX | MillingTurningFinishing | - |
| Astro Manufacturing & Design Inc Milling, Turning, Laser, Waterjet, Welding, EDM, Finishing, Assembly · ISO 9001, NADCAP | Eastlake, OH | MillingTurningLaserWaterjetWeldingEDMFinishingAssembly | ISO 9001, NADCAP |
| Atmosphere Machining LLC Milling, Turning, Waterjet, Welding, Finishing · ITAR | Tehachapi, CA | MillingTurningWaterjetWeldingFinishing | ITAR |
| Atomic Machine & EDM Inc Milling, Turning, Swiss, EDM, Finishing · ISO 9001, ITAR, ISO 13485 | Naples, FL | MillingTurningSwissEDMFinishing | ISO 9001, ITAR, ISO 13485 |
| Atscott Mfg, Inc Milling, Turning, Laser, Waterjet, Punching, Bending, Welding, Stamping, Grinding, Finishing, Assembly · ISO 9001, ITAR | Pine City, MN | MillingTurningLaserWaterjetPunchingBendingWeldingStampingGrindingFinishingAssembly | ISO 9001, ITAR |
| Augustine Die & Mold Inc Milling, Turning, Waterjet, Stamping, Finishing · ISO 9001, AS9100, ITAR | Somerset, PA | MillingTurningWaterjetStampingFinishing | ISO 9001, AS9100, ITAR |
| Auto-Turn Acquisition, LLC Milling, Turning, Welding, Stamping, Grinding, Finishing · ISO 9001, AS9100 | Tulsa, OK | MillingTurningWeldingStampingGrindingFinishing | ISO 9001, AS9100 |
| Autopilot Inc Milling, Turning, Finishing | Bozeman, MT | MillingTurningFinishing | - |
| Avanti Engineering Inc Milling, Turning, Swiss, EDM, Grinding, Finishing, Assembly · ISO 9001 | Glendale Heights, IL | MillingTurningSwissEDMGrindingFinishingAssembly | ISO 9001 |
| Axion Labs Inc Milling, Turning, Finishing · ISO 9001, AS9100, ITAR, ISO 13485 | Westlake, OH | MillingTurningFinishing | ISO 9001, AS9100, ITAR, ISO 13485 |
| Axton Robotics LLC Milling, Turning, Finishing | San Diego, CA | MillingTurningFinishing | - |
| Az Fine Arc LLC Turning, Waterjet, Bending, Welding, Finishing | Tucson, AZ | TurningWaterjetBendingWeldingFinishing | - |
| Aztec Plastic Company Welding, Stamping, Grinding, Finishing, Assembly | Chicago, IL | WeldingStampingGrindingFinishingAssembly | - |
| B & B Manufacturing Co, Inc Laser, Bending, Welding, Finishing | Forest Hill, MD | LaserBendingWeldingFinishing | - |
| B & H Toolworks Inc Milling, Turning, Laser, Bending, Welding, Stamping, EDM, Finishing · ISO 9001 | Richmond, KY | MillingTurningLaserBendingWeldingStampingEDMFinishing | ISO 9001 |
| B & W Machine Works, Inc Milling, Turning, Swiss, Grinding, Finishing · AS9100, NADCAP | Perkasie, PA | MillingTurningSwissGrindingFinishing | AS9100, NADCAP |
| Babbitt Bearing Co Inc Welding, Grinding, Finishing | San Jose, CA | WeldingGrindingFinishing | - |
| Banner Metalcraft Inc Milling, Turning, Laser, Punching, Bending, Welding, Stamping, Grinding, Finishing · AS9100 | Ronkonkoma, NY | MillingTurningLaserPunchingBendingWeldingStampingGrindingFinishing | AS9100 |
| Be Cu Manufacturing Co, Inc Welding, Stamping, EDM, Finishing · ISO 9001, ITAR | Scotch Plains, NJ | WeldingStampingEDMFinishing | ISO 9001, ITAR |
| Bedford Machine & Tool Inc Milling, Turning, Welding, Casting, Finishing | Bedford, IN | MillingTurningWeldingCastingFinishing | - |
| Beers Tooling and Machining Milling, Turning, Welding, Finishing · ISO 9001 | Jim Thorpe, PA | MillingTurningWeldingFinishing | ISO 9001 |
| Bell Machine Works Milling, Finishing · ISO 9001, ITAR | Gilroy, CA | MillingFinishing | ISO 9001, ITAR |
| Beltim & Associates, LLC Milling, Turning, Swiss, Waterjet, Stamping, Casting, EDM, Finishing · ISO 9001, ITAR, ISO 13485 | Pleasanton, CA | MillingTurningSwissWaterjetStampingCastingEDMFinishing | ISO 9001, ITAR, ISO 13485 |
| Benen Manufacturing LLC Milling, Turning, Welding, Finishing, Assembly · ISO 9001, ISO 13485 | San Jose, CA | MillingTurningWeldingFinishingAssembly | ISO 9001, ISO 13485 |
| Bennett Manufacturing Company, Inc Laser, Welding, Finishing | Alden, NY | LaserWeldingFinishing | - |
| Bent River Machine Inc Milling, Turning, Bending, Welding, EDM, Grinding, Finishing, Assembly · ISO 9001 | Clarkdale, AZ | MillingTurningBendingWeldingEDMGrindingFinishingAssembly | ISO 9001 |
| Bertrand Products, Inc Milling, Turning, Grinding, Finishing · ISO 9001 | South Bend, IN | MillingTurningGrindingFinishing | ISO 9001 |
| Billet Studio LLC Finishing | Round Rock, TX | Finishing | - |
| Bishop Aerospace LLC Milling, Turning, Swiss, Finishing | Aledo, TX | MillingTurningSwissFinishing | - |
| Bison Profab Inc Laser, Punching, Bending, Welding, Finishing · ISO 9001 | Magnolia, TX | LaserPunchingBendingWeldingFinishing | ISO 9001 |
| Blackstar CNC LLC Milling, Laser, Bending, Welding, Finishing · ISO 9001 | Merrillville, IN | MillingLaserBendingWeldingFinishing | ISO 9001 |
| Blackstone Advanced Technologies Milling, Turning, Laser, Punching, Bending, Welding, Finishing, Assembly · ISO 9001 | Jamestown, NY | MillingTurningLaserPunchingBendingWeldingFinishingAssembly | ISO 9001 |
| Blue Arc Metal Specialties, Inc Bending, Welding, Finishing | Claremore, OK | BendingWeldingFinishing | - |
| Blue Chip Machine Milling, Finishing, Assembly | Vassalboro, ME | MillingFinishingAssembly | - |
| Blue Ridge Machine Works Inc Milling, Turning, Waterjet, Welding, Grinding, Finishing | Verona, VA | MillingTurningWaterjetWeldingGrindingFinishing | - |
| Bluewater Industries Inc Milling, Turning, Welding, Casting, Finishing | Moses Lake, WA | MillingTurningWeldingCastingFinishing | - |
| 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 | - |
| Bozeman CNC LLC Milling, Laser, Finishing · ISO 9001, AS9100, ITAR | Manhattan, MT | MillingLaserFinishing | ISO 9001, AS9100, ITAR |
| Bradhart Products, Inc Milling, Turning, Finishing · ISO 9001, ITAR | Brighton, MI | MillingTurningFinishing | ISO 9001, ITAR |
| Brantley R Lingerfelt Milling, Turning, Finishing | Carnesville, GA | MillingTurningFinishing | - |
| Braswell Precision Inc Milling, Turning, EDM, Finishing, Assembly · ISO 9001, NADCAP | Glen Burnie, MD | MillingTurningEDMFinishingAssembly | ISO 9001, NADCAP |
| Breakout Manufacturing, LLC Milling, Finishing, Assembly · ITAR, CMMC | Murphy, TX | MillingFinishingAssembly | ITAR, CMMC |
| Britech Electropolishing Inc Welding, Finishing | Newark, CA | WeldingFinishing | - |
| Brooks Industrial, LLC Milling, Grinding, Finishing | North Attleboro, MA | MillingGrindingFinishing | - |
| Broomfield Sheet Metal Inc Welding, Finishing | Lafayette, CO | WeldingFinishing | - |
| Brost Cleveland LLC Turning, Casting, Finishing, Assembly · ISO 9001 | Cleveland, OH | TurningCastingFinishingAssembly | ISO 9001 |
| Brot Inc Laser, Punching, Welding, Stamping, Finishing, Assembly | Cleveland, OH | LaserPunchingWeldingStampingFinishingAssembly | - |
| BT Machine Inc Milling, Turning, Welding, Finishing · ISO 9001, AS9100, ITAR | Tulsa, OK | MillingTurningWeldingFinishing | ISO 9001, AS9100, ITAR |
| Budde Precision Machining Corp Milling, Turning, Welding, EDM, Grinding, Finishing, Assembly · ISO 9001, AS9100, ITAR, NADCAP, ISO 13485 | Dayton, OH | MillingTurningWeldingEDMGrindingFinishingAssembly | ISO 9001, AS9100, ITAR, NADCAP, ISO 13485 |