| 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 Machining Solutions Milling, Turning, Welding | Oklahoma City, OK | MillingTurningWelding | - |
| Advanced Machining Technologies L.L.C Milling, Turning · ISO 9001, AS9100 | Plainville, CT | MillingTurning | ISO 9001, AS9100 |
| Advanced Manufacturing & Fabrication Inc Milling, Turning, Laser, Punching, Bending, Welding, Stamping | Phoenix, AZ | MillingTurningLaserPunchingBendingWeldingStamping | - |
| 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 Precision Engineering Milling, Turning, EDM · ISO 9001, AS9100 | Ipswich, MA | MillingTurningEDM | ISO 9001, AS9100 |
| Advanced Precision Machining, Inc Milling, Welding, EDM, Finishing · AS9100 | Garden City, ID | MillingWeldingEDMFinishing | AS9100 |
| Aero Components Inc Milling, Turning, EDM, Grinding · ISO 9001 | Oklahoma City, OK | MillingTurningEDMGrinding | ISO 9001 |
| 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 |
| Aeromethod Precision Milling, Turning, EDM · ITAR | Las Vegas, NV | MillingTurningEDM | ITAR |
| Aeropact Manufacturing LLC Milling · ISO 9001, AS9100 | Bowling Green, OH | Milling | ISO 9001, AS9100 |
| Aeroparts Fabricating & Machining Inc Milling, Punching, Bending, Finishing · ISO 9001, AS9100, NADCAP | Nicktown, PA | MillingPunchingBendingFinishing | ISO 9001, AS9100, NADCAP |
| AeroParts Machining Milling · ISO 9001 | Mansfield, TX | Milling | ISO 9001 |
| Aerospace Fabrications of Georgia Inc Milling, Waterjet, Bending · ISO 9001, AS9100, ITAR | Dallas, GA | MillingWaterjetBending | ISO 9001, AS9100, ITAR |
| Aerotech Precision Machining, Inc Milling, Turning, Assembly · ISO 9001, AS9100 | Lancaster, CA | MillingTurningAssembly | ISO 9001, AS9100 |
| Aether Flow Technologies LLC Milling | Everett, WA | Milling | - |
| Agi Corporation Milling, Turning, Welding, EDM, Finishing | Huntsville, AL | MillingTurningWeldingEDMFinishing | - |
| Air-Lake Machine Milling, Turning, Welding | Lakeville, MN | MillingTurningWelding | - |
| Albert Precision Machining Milling, Turning, Grinding | Omaha, NE | MillingTurningGrinding | - |
| ALC Engineered Solutions Company Milling, Turning, Swiss, EDM, Finishing · ISO 9001 | Lockwood, MO | MillingTurningSwissEDMFinishing | ISO 9001 |
| Alex Machining Corp Milling, Turning | San Diego, CA | MillingTurning | - |
| Alkab Machine Milling, Turning, Welding, Assembly | New Kensington, PA | MillingTurningWeldingAssembly | - |
| All American Finishing LLC Milling, Bending, Welding, Stamping | Las Vegas, NV | MillingBendingWeldingStamping | - |
| All Craft Manufacturing Co Milling | Cincinnati, OH | Milling | - |
| All Materials Manufacturing Co LLC Milling, Turning, Swiss, Finishing · ISO 9001, AS9100, ITAR | Riverside, CA | MillingTurningSwissFinishing | ISO 9001, AS9100, ITAR |
| All-American Engineering & Manufacturing, Inc Milling, Turning, Welding, Stamping, EDM, Grinding, Finishing · ISO 9001 | Saint Paul, MN | MillingTurningWeldingStampingEDMGrindingFinishing | ISO 9001 |
| All-Around Fabrication Inc Milling, Laser, Bending, Welding · ITAR | Sacramento, CA | MillingLaserBendingWelding | ITAR |
| All-In Machining LLC Milling, Turning | Tracy, CA | MillingTurning | - |
| All-Ways Metal Inc Milling, Turning, Laser, Punching, Bending, Welding, Grinding · ISO 9001, ITAR | Gardena, CA | MillingTurningLaserPunchingBendingWeldingGrinding | ISO 9001, ITAR |
| Alliance Machine and Fabrication, LLC Milling, Turning | Ashland City, TN | MillingTurning | - |
| Allied Industrial Machine Services Inc Milling, Turning, Welding, Grinding, Finishing | Falls Church, VA | MillingTurningWeldingGrindingFinishing | - |
| Allied Machining Co., Inc Milling, Turning, Welding, EDM, Grinding, Finishing, Assembly | Newington, CT | MillingTurningWeldingEDMGrindingFinishingAssembly | - |
| Allied Precision Components LLC Milling, Turning, Swiss | Wallingford, CT | MillingTurningSwiss | - |
| Allied Precision, Inc Milling, Turning, Swiss, Welding, Grinding · ISO 9001 | Middletown, DE | MillingTurningSwissWeldingGrinding | ISO 9001 |
| Allied Specialty Precision Inc Milling, Turning, Welding, EDM · ISO 9001, AS9100, NADCAP | Mishawaka, IN | MillingTurningWeldingEDM | ISO 9001, AS9100, NADCAP |
| Allis-Roller LLC Milling, Turning, Welding, Grinding, Assembly | Franklin, WI | MillingTurningWeldingGrindingAssembly | - |
| Alloy Metal Products Milling, Turning, EDM, Assembly | Livermore, CA | MillingTurningEDMAssembly | - |
| Alpha Aviation Components, Inc Milling, Turning · ISO 9001, AS9100, ITAR | North Hills, CA | MillingTurning | ISO 9001, AS9100, ITAR |
| Alpha Foundry Co Milling, Turning, Casting, Finishing | Wright City, MO | MillingTurningCastingFinishing | - |
| Alpha Machining & Manufacturing Milling, Turning · AS9100 | Tulsa, OK | MillingTurning | AS9100 |
| Alpine Conglomerate, LLC Milling, Welding · ISO 9001, AS9100, ITAR, NADCAP, CMMC | Bloomer, WI | MillingWelding | ISO 9001, AS9100, ITAR, NADCAP, CMMC |
| Alziebler Incorporated Milling, Turning, Welding, Grinding, Finishing · ISO 9001, AS9100, ITAR, NADCAP | Arleta, CA | MillingTurningWeldingGrindingFinishing | ISO 9001, AS9100, ITAR, NADCAP |
| Am Specialties, Inc Milling, Welding, Stamping, EDM, Grinding, Finishing, Assembly · ISO 9001 | Sterling Heights, MI | MillingWeldingStampingEDMGrindingFinishingAssembly | ISO 9001 |
| Amador Steel and Supply, LLC Milling, Punching, Bending, Welding | Jackson, CA | MillingPunchingBendingWelding | - |
| Amark Machine Works, LLC Milling, Turning, Welding, Stamping, EDM, Grinding | Gravette, AR | MillingTurningWeldingStampingEDMGrinding | - |