| Accu-Tech Manufacturing Milling, Turning, Welding | Shelby Township, MI | MillingTurningWelding | - |
| Accu-Tek Engineering, Inc Milling, Turning, Grinding | Plantsville, CT | MillingTurningGrinding | - |
| Accu-Tool, LLC Milling, Turning, EDM · ISO 9001, AS9100 | Apex, NC | MillingTurningEDM | ISO 9001, AS9100 |
| Accura Industries Inc Milling, Turning · ISO 9001 | Fairport, NY | MillingTurning | ISO 9001 |
| Accurate Industrial Machining Inc Milling, Turning, Laser, Bending, Welding, Assembly · ISO 9001, ITAR, CMMC | Holbrook, NY | MillingTurningLaserBendingWeldingAssembly | ISO 9001, ITAR, CMMC |
| Accurate Machine Works Milling, Turning, Welding, EDM | College Sta, TX | MillingTurningWeldingEDM | - |
| Accurate Marking Products, Inc Milling, Turning, EDM · ISO 9001, AS9100, ITAR | New Kensington, PA | MillingTurningEDM | ISO 9001, AS9100, ITAR |
| Accurounds, Inc Milling, Turning, Swiss, Grinding, Assembly · ISO 9001, AS9100, ISO 13485 | Avon, MA | MillingTurningSwissGrindingAssembly | ISO 9001, AS9100, ISO 13485 |
| Accuturn Corp Milling, Turning, Swiss, Grinding · AS9100 | Moreno Valley, CA | MillingTurningSwissGrinding | AS9100 |
| Ace Manufacturing Inc Milling, Turning · ISO 9001 | Green Bay, WI | MillingTurning | ISO 9001 |
| Acro Manufacturing Corporation Milling, Turning, Welding · ISO 9001 | Cedar Rapids, IA | MillingTurningWelding | ISO 9001 |
| Action Tool Service Inc Turning, Welding, EDM, Grinding | Hampton, VA | TurningWeldingEDMGrinding | - |
| Advance Apex Inc Milling, Turning, Swiss, Welding · ISO 9001, AS9100, ITAR | Grove City, OH | MillingTurningSwissWelding | ISO 9001, AS9100, ITAR |
| Advance Manufacturing Tech Milling, Turning, Welding · ISO 9001, AS9100 | Salt Lake City, UT | MillingTurningWelding | ISO 9001, AS9100 |
| Advanced CNC Technology Inc Milling, Turning, Welding, Grinding · ISO 9001, ITAR | Sterling Heights, MI | MillingTurningWeldingGrinding | ISO 9001, ITAR |
| Advanced Engineering & EDM, Inc Milling, Turning, Laser, Stamping, EDM, Grinding | Poway, CA | MillingTurningLaserStampingEDMGrinding | - |
| 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 Inc Milling, Turning, Waterjet, Welding | New Smyrna Beach, FL | MillingTurningWaterjetWelding | - |
| 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 Materials Technologies, LLC Milling, Turning, Welding, EDM, Grinding · ISO 9001, AS9100 | Chandler, AZ | MillingTurningWeldingEDMGrinding | ISO 9001, AS9100 |
| Advanced Mechatronics Corp Milling, Turning, Welding, EDM, Grinding | Norton Shores, MI | MillingTurningWeldingEDMGrinding | - |
| Advanced Turning Solutions, LLC Turning | Port Huron, MI | Turning | - |
| Aeg Industries, Inc Milling, Turning, Bending, Grinding · ISO 9001, ITAR | Santa Rosa, CA | MillingTurningBendingGrinding | ISO 9001, ITAR |
| Aero Components Inc Milling, Turning, EDM, Grinding · ISO 9001 | Oklahoma City, OK | MillingTurningEDMGrinding | ISO 9001 |
| Aero Tech Manufactuting Inc Milling, Turning, Laser, Punching, Bending, Welding, Finishing, Assembly · ISO 9001 | North Salt Lake, UT | MillingTurningLaserPunchingBendingWeldingFinishingAssembly | ISO 9001 |
| 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 |
| Aerotech Precision Machining, Inc Milling, Turning, Assembly · ISO 9001, AS9100 | Lancaster, CA | MillingTurningAssembly | ISO 9001, AS9100 |
| AGF Custom Metal Concepts Turning, Bending, Laser, Welding | Dallas, TX | TurningBendingLaserWelding | - |
| Alanson Mfg L.L.C Turning, Finishing · ISO 9001, ITAR | Chicago, IL | TurningFinishing | ISO 9001, ITAR |
| Aldrich Solutions Incorporated Turning · ISO 9001, ITAR | Williamsville, NY | Turning | ISO 9001, ITAR |
| Algonquin Industries Inc Milling, Turning, Laser, Bending, Welding, Grinding, Assembly | Bellingham, MA | MillingTurningLaserBendingWeldingGrindingAssembly | - |
| Alkab Machine Milling, Turning, Welding, Assembly | New Kensington, PA | MillingTurningWeldingAssembly | - |
| All-American Engineering & Manufacturing, Inc Milling, Turning, Welding, Stamping, EDM, Grinding, Finishing · ISO 9001 | Saint Paul, MN | MillingTurningWeldingStampingEDMGrindingFinishing | ISO 9001 |
| All-In Machining LLC Milling, Turning | Tracy, CA | MillingTurning | - |
| Allen Co Milling, Turning, Swiss | Minnetonka, MN | MillingTurningSwiss | - |
| Allen Tool Phoenix Inc Milling, Turning · ISO 9001, AS9100 | East Syracuse, NY | MillingTurning | ISO 9001, AS9100 |
| Allied Chucker and Engineering Company Milling, Turning, Grinding, Assembly | Jackson, MI | MillingTurningGrindingAssembly | - |
| 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 Technologies Milling, Turning, Swiss · ITAR, ISO 13485 | Wilsonville, OR | MillingTurningSwiss | ITAR, ISO 13485 |
| Allis-Roller LLC Milling, Turning, Welding, Grinding, Assembly | Franklin, WI | MillingTurningWeldingGrindingAssembly | - |
| Alloy Metal Products Milling, Turning, EDM, Assembly | Livermore, CA | MillingTurningEDMAssembly | - |
| Alltech Precision Manufacturing Milling, Turning, EDM | Valencia, CA | MillingTurningEDM | - |
| Alm Technologies Milling, Turning, Waterjet, Bending | Yulee, FL | MillingTurningWaterjetBending | - |
| Alpha Foundry Co Milling, Turning, Casting, Finishing | Wright City, MO | MillingTurningCastingFinishing | - |
| Alpha Machining & Manufacturing Milling, Turning · AS9100 | Tulsa, OK | MillingTurning | AS9100 |