| Advance Manufacturing Tech Milling, Turning, Welding · ISO 9001, AS9100 | Salt Lake City, UT | MillingTurningWelding | ISO 9001, AS9100 |
| Advance Metal Fabrication Mach Turning, Laser, Punching, Bending, Welding, Stamping, Finishing | Prescott, AZ | TurningLaserPunchingBendingWeldingStampingFinishing | - |
| Advance Screw Products, Inc Turning, Swiss, Grinding, Finishing | St. Francis, WI | TurningSwissGrindingFinishing | - |
| Advance Tool Co Inc Milling, EDM, Grinding | Safety Harbor, FL | MillingEDMGrinding | - |
| Advance Virtu CNC Milling, Turning | Glendale, CA | MillingTurning | - |
| Advanced Automotive Group, L.L.C Milling, Welding, Stamping | Algonac, MI | MillingWeldingStamping | - |
| Advanced Ceramic Technology Grinding · ITAR | Orange, CA | Grinding | ITAR |
| Advanced CNC Manufacturing Inc Milling, Grinding · ISO 9001 | Odessa, FL | MillingGrinding | ISO 9001 |
| Advanced CNC Technology Inc Milling, Turning, Welding, Grinding · ISO 9001, ITAR | Sterling Heights, MI | MillingTurningWeldingGrinding | ISO 9001, ITAR |
| Advanced Fabrication Bending, Welding, Waterjet | Bakersfield, CA | BendingWeldingWaterjet | - |
| Advanced Machine & Tooling Inc Milling, Turning, Laser, Punching, Bending, Welding, Stamping, Grinding | Virginia Beach, VA | MillingTurningLaserPunchingBendingWeldingStampingGrinding | - |
| Advanced Machine Inc Milling, Turning, Welding, EDM, Grinding, Finishing, Assembly · ISO 9001, AS9100, ITAR, ISO 13485 | Winchester, TN | MillingTurningWeldingEDMGrindingFinishingAssembly | ISO 9001, AS9100, ITAR, ISO 13485 |
| Advanced Machining Milling, Turning, Swiss, EDM · ISO 9001, ITAR | Longmont, CO | MillingTurningSwissEDM | ISO 9001, ITAR |
| Advanced Machining & Tooling, LLC Milling, Turning, Welding, Stamping, EDM, Grinding, Finishing · ISO 9001 | Salisbury, NC | MillingTurningWeldingStampingEDMGrindingFinishing | ISO 9001 |
| Advanced Metal Manufacturing Inc Milling, Laser, Punching, Bending, Welding, Finishing · ISO 9001, AS9100 | Simi Valley, CA | MillingLaserPunchingBendingWeldingFinishing | ISO 9001, AS9100 |
| Advanced Metals Machining LLC Milling, Finishing | Olyphant, PA | MillingFinishing | - |
| Advanced Plating Technologies Welding, Finishing · ISO 9001, ITAR, ISO 13485 | Milwaukee, WI | WeldingFinishing | ISO 9001, ITAR, ISO 13485 |
| Advanced Precision Machining, Inc Milling, Welding, EDM, Finishing · AS9100 | Garden City, ID | MillingWeldingEDMFinishing | AS9100 |
| Advanced Precision Machining, LLC Milling, Turning, Laser, Waterjet, EDM, Assembly · AS9100, ITAR, CMMC | Costa Mesa, CA | MillingTurningLaserWaterjetEDMAssembly | AS9100, ITAR, CMMC |
| Advanced Thrtical Concepts Inc Milling, Turning, Swiss, Laser, Waterjet, Welding, Grinding, Finishing | Camarillo, CA | MillingTurningSwissLaserWaterjetWeldingGrindingFinishing | - |
| Advanced Turning Solutions, LLC Turning | Port Huron, MI | Turning | - |
| Advantage Metal Products, Inc Milling, Bending, Finishing, Assembly · ITAR | Livermore, CA | MillingBendingFinishingAssembly | ITAR |
| Advantech Industries Inc Milling, Laser, Waterjet, Punching, Bending, Welding, Assembly · ISO 9001, ITAR | Rochester, NY | MillingLaserWaterjetPunchingBendingWeldingAssembly | ISO 9001, ITAR |
| Advent Precision Inc Milling, EDM · ISO 9001 | Indianapolis, IN | MillingEDM | ISO 9001 |
| Aeg Industries, Inc Milling, Turning, Bending, Grinding · ISO 9001, ITAR | Santa Rosa, CA | MillingTurningBendingGrinding | ISO 9001, ITAR |
| Aegis Sales & Engineering Inc. Milling, Turning, Bending, Stamping · ISO 9001 | Fort Wayne, IN | MillingTurningBendingStamping | ISO 9001 |
| Aero Component Repair, LLC Welding, Grinding, Finishing | Durant, OK | WeldingGrindingFinishing | - |
| Aero Components Inc Milling, Turning, EDM, Grinding · ISO 9001 | Oklahoma City, OK | MillingTurningEDMGrinding | ISO 9001 |
| Aero Industries, LLC Milling · ISO 9001 | Buellton, CA | Milling | ISO 9001 |
| Aero Mechanism Precision Inc Milling, Assembly · ISO 9001, AS9100 | Chatsworth, CA | MillingAssembly | ISO 9001, AS9100 |
| Aero-Mach Precision LLC Milling, Turning, Welding, Finishing | Mesa, AZ | MillingTurningWeldingFinishing | - |
| Aero-Space Tooling & Machining Milling, Turning, EDM · ISO 9001, AS9100 | Salt Lake City, UT | MillingTurningEDM | ISO 9001, AS9100 |
| Aero-Tech Engineering Inc Milling, Turning, Welding, Assembly · ISO 9001, AS9100, ITAR | Maize, KS | MillingTurningWeldingAssembly | ISO 9001, AS9100, ITAR |
| Aerodef Innovatec LLC Milling | Mooresville, NC | Milling | - |
| Aeromax Technologies LLC Welding, Assembly · AS9100, ITAR | Savannah, GA | WeldingAssembly | AS9100, ITAR |
| AeroParts Machining Milling · ISO 9001 | Mansfield, TX | Milling | ISO 9001 |
| Aerospace Manufacturing Inc Welding, Assembly · AS9100 | Canyon Countrt, CA | WeldingAssembly | AS9100 |
| Affiliated Energy Products, Inc Milling, Turning, Welding, Stamping, Finishing | Iowa Park, TX | MillingTurningWeldingStampingFinishing | - |
| Affirmative Solutions Bending, Welding | Albuquerque, NM | BendingWelding | - |
| Air-Lake Machine Milling, Turning, Welding | Lakeville, MN | MillingTurningWelding | - |
| Airtronics Metal Products Milling, Laser, Punching, Bending, Welding, Assembly · ISO 9001, ISO 13485 | Morgan Hill, CA | MillingLaserPunchingBendingWeldingAssembly | ISO 9001, ISO 13485 |
| Akins Manufacturing, Inc Welding | Algodones, NM | Welding | - |
| Akron Steel Fabricators Inc Bending | Akron, OH | Bending | - |
| Akt Manufacturing LLC Milling | Columbia, KY | Milling | - |
| Alamo City Custom Welding & Construction Welding | San Antonio, TX | Welding | - |
| Alanson Mfg L.L.C Turning, Finishing · ISO 9001, ITAR | Chicago, IL | TurningFinishing | ISO 9001, ITAR |
| Alaskan Copper Works Bending, Welding, Waterjet | Seattle, WA | BendingWeldingWaterjet | - |
| Albert Precision Machining Milling, Turning, Grinding | Omaha, NE | MillingTurningGrinding | - |
| Albion Machine and Tool LLC Milling, Turning, Laser, Welding, Grinding, Finishing | Albion, MI | MillingTurningLaserWeldingGrindingFinishing | - |
| ALC Engineered Solutions Company Milling, Turning, Swiss, EDM, Finishing · ISO 9001 | Lockwood, MO | MillingTurningSwissEDMFinishing | ISO 9001 |