| Allied Metals Co Laser, Welding | Johnson City, TN | LaserWelding | - |
| Allied Precision, Inc Milling, Turning, Swiss, Welding, Grinding · ISO 9001 | Middletown, DE | MillingTurningSwissWeldingGrinding | ISO 9001 |
| Alloy Welding and Manufacturing Co., Inc. Welding, Waterjet · ISO 9001 | Bristol, CT | WeldingWaterjet | ISO 9001 |
| Alloyed Solutions LLC Laser, Bending, Welding, Finishing · ISO 9001 | Price, UT | LaserBendingWeldingFinishing | ISO 9001 |
| Allwayzmags LLC Welding | Pine Bluffs, WY | Welding | - |
| Amador Steel and Supply, LLC Milling, Punching, Bending, Welding | Jackson, CA | MillingPunchingBendingWelding | - |
| Ameco USA Bending, Welding, Waterjet · NADCAP | Cleveland, OH | BendingWeldingWaterjet | NADCAP |
| Amerimac Machining Corp Milling, Turning, Welding | Jackson, MS | MillingTurningWelding | - |
| Amp Precision Metal LLC Bending, Welding | Ada, OK | BendingWelding | - |
| AMS Accurate Metal Milling, Bending, Laser, Welding, Stamping · AS9100 | Richland Hills, TX | MillingBendingLaserWeldingStamping | AS9100 |
| Amscot Structural Products Corporation Turning, Welding | Dover, NJ | TurningWelding | - |
| Anaheim Precision Milling, Turning, Bending, Laser, Welding, Waterjet · ISO 9001, AS9100, NADCAP | Orange, CA | MillingTurningBendingLaserWeldingWaterjet | ISO 9001, AS9100, NADCAP |
| Anderson Metal Industries Inc Milling, Turning, Welding, EDM, Grinding, Finishing · ISO 9001, ITAR | Franklin, PA | MillingTurningWeldingEDMGrindingFinishing | ISO 9001, ITAR |
| Ankeny Automation, LLC Milling, Laser, Welding, Grinding, Finishing | Omaha, NE | MillingLaserWeldingGrindingFinishing | - |
| Antonio's Metal Works, Inc Welding | El Cajon, CA | Welding | - |
| Ao Metalworks LLC Laser, Bending, Welding | Clearwater, FL | LaserBendingWelding | - |
| Apahouser Inc Laser, Punching, Bending, Welding, Stamping · ISO 9001, AS9100, ITAR | Marlborough, MA | LaserPunchingBendingWeldingStamping | ISO 9001, AS9100, ITAR |
| Apex Design Technology of Alabama LLC Milling, Turning, Bending, Welding, Assembly · ISO 9001 | Decatur, AL | MillingTurningBendingWeldingAssembly | ISO 9001 |
| Apex Engineered Products Milling, Turning, Waterjet, Welding, Finishing | Clark, PA | MillingTurningWaterjetWeldingFinishing | - |
| Apparatus Mfg., Inc Welding, Grinding, Finishing, Assembly | Poughkeepsie, NY | WeldingGrindingFinishingAssembly | - |
| Ariam Industries LLC Milling, Turning, Welding | Baraga, MI | MillingTurningWelding | - |
| Armes Precision Milling, Turning, Laser, Bending, Welding, Assembly · ISO 9001, ITAR | Lynchburg, VA | MillingTurningLaserBendingWeldingAssembly | ISO 9001, ITAR |
| Armor Contract Manufacturing Inc Welding, Stamping, Finishing | Elkhart, IN | WeldingStampingFinishing | - |
| Ascend Mfg Corp Milling, Laser, Welding, Stamping, Finishing | Anaheim, CA | MillingLaserWeldingStampingFinishing | - |
| Ash-Tec Laser, Welding, Finishing | Hegins, PA | LaserWeldingFinishing | - |
| Asset Solutions Inc Milling, Turning, Bending, Welding, Assembly · ISO 9001 | Hutto, TX | MillingTurningBendingWeldingAssembly | ISO 9001 |
| Ast Manufacturing Milling, Laser, Punching, Bending, Welding, Assembly · ISO 9001 | Grand Prairie, TX | MillingLaserPunchingBendingWeldingAssembly | ISO 9001 |
| Astro Aircom LLC Milling, Turning, Welding, Grinding, Finishing · ISO 9001, AS9100, ITAR | Bloomfield, CT | MillingTurningWeldingGrindingFinishing | ISO 9001, AS9100, ITAR |
| Astro Machine Works Milling, Turning, Welding, Assembly · ISO 9001, CMMC | Ephrata, PA | MillingTurningWeldingAssembly | ISO 9001, CMMC |
| Astro Manufacturing & Design Inc Milling, Turning, Laser, Waterjet, Welding, EDM, Finishing, Assembly · ISO 9001, NADCAP | Eastlake, OH | MillingTurningLaserWaterjetWeldingEDMFinishingAssembly | ISO 9001, NADCAP |
| Atlantic Metal Products, Inc Waterjet, Bending, Welding | Topping, VA | WaterjetBendingWelding | - |
| Atlas Tool & Die Works Inc Turning, Laser, Waterjet, Welding, Stamping, EDM, Assembly | Lyons, IL | TurningLaserWaterjetWeldingStampingEDMAssembly | - |
| 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 |
| Az Fine Arc LLC Turning, Waterjet, Bending, Welding, Finishing | Tucson, AZ | TurningWaterjetBendingWeldingFinishing | - |
| B & C Machine Welding, Waterjet | Oklahoma City, OK | WeldingWaterjet | - |
| B & J Specialty Inc Milling, Welding, EDM | Wawaka, IN | MillingWeldingEDM | - |
| Baldwin Metals Inc Milling, Turning, Bending, Laser, Welding | Dallas, TX | MillingTurningBendingLaserWelding | - |
| Banner Metalcraft Inc Milling, Turning, Laser, Punching, Bending, Welding, Stamping, Grinding, Finishing · AS9100 | Ronkonkoma, NY | MillingTurningLaserPunchingBendingWeldingStampingGrindingFinishing | AS9100 |
| Baron Machine Co., Inc. Milling, Turning, Welding · ISO 9001, AS9100, ITAR | Laconia, NH | MillingTurningWelding | ISO 9001, AS9100, ITAR |
| Baum Machine Inc Milling, Turning, Welding | Appleton, WI | MillingTurningWelding | - |
| 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 | - |
| Belfanti Machine Works LLC Milling, Turning, Waterjet, Welding, Stamping | Beaverton, OR | MillingTurningWaterjetWeldingStamping | - |
| Bell Machine Co Inc Milling, Turning, Welding, Grinding · ISO 9001 | Shreveport, LA | MillingTurningWeldingGrinding | ISO 9001 |
| Ben Parker Company Bending, Laser, Welding, Waterjet | Chattanooga, TN | BendingLaserWeldingWaterjet | - |
| Bennett Manufacturing Company, Inc Laser, Welding, Finishing | Alden, NY | LaserWeldingFinishing | - |
| Benson Machine Works Inc. Turning, Bending, Laser, Welding | Omaha, NE | TurningBendingLaserWelding | - |
| Bent River Machine Inc Milling, Turning, Bending, Welding, EDM, Grinding, Finishing, Assembly · ISO 9001 | Clarkdale, AZ | MillingTurningBendingWeldingEDMGrindingFinishingAssembly | ISO 9001 |
| Billet Industries Inc Milling, Turning, Laser, Welding, EDM, Grinding, Assembly · AS9100 | York, PA | MillingTurningLaserWeldingEDMGrindingAssembly | AS9100 |