| Foranne Manufacturing, Inc Milling, Turning · ISO 9001 | Warminster, PA | MillingTurning | ISO 9001 |
| Forge 41 Inc Milling, Bending, Finishing | Central Village, CT | MillingBendingFinishing | - |
| Forge Precision Co Milling, Turning, Welding · ISO 9001 | Farmington Hills, MI | MillingTurningWelding | ISO 9001 |
| Forma Machine, LLC Milling, Casting · AS9100 | South Pittsburg, TN | MillingCasting | AS9100 |
| Forster Precision Tool, LLC Milling, Turning, Welding, EDM, Grinding | Seymour, CT | MillingTurningWeldingEDMGrinding | - |
| Fort Walton Machining Inc Milling, Turning, Waterjet, Welding, EDM, Grinding, Finishing · ITAR | Fort Walton Beach, FL | MillingTurningWaterjetWeldingEDMGrindingFinishing | ITAR |
| Forza Engineering Group Corp Milling, Turning | Laguna Niguel, CA | MillingTurning | - |
| Fox Worx Precision LLC Milling, Finishing · ISO 9001, ITAR | Ontario, OR | MillingFinishing | ISO 9001, ITAR |
| Franco Machine Milling, Turning, Welding · AS9100, ITAR | Loma, CO | MillingTurningWelding | AS9100, ITAR |
| Frankenstein Defense LLC Milling · AS9100, ITAR, CMMC | Weatherford, TX | Milling | AS9100, ITAR, CMMC |
| Franklin Machine Shop, Inc Milling · ISO 9001 | Hampton, VA | Milling | ISO 9001 |
| Franklin Sheet Metal, LLC Milling, Laser, Waterjet, Punching, Bending, Welding, Grinding, Finishing · ITAR | Franklin, MA | MillingLaserWaterjetPunchingBendingWeldingGrindingFinishing | ITAR |
| Franklin’s Industries Milling, Turning, Waterjet, Welding, EDM · ISO 9001, AS9100 | Poway, CA | MillingTurningWaterjetWeldingEDM | ISO 9001, AS9100 |
| Freeman Custom Machining LLC Milling | Waterloo, SC | Milling | - |
| Front Panel Express LLC Milling, Finishing | Kent, WA | MillingFinishing | - |
| Frontier Metal Stamping Inc Milling, Bending, Welding, Stamping, Finishing · ISO 9001 | Erie, CO | MillingBendingWeldingStampingFinishing | ISO 9001 |
| FTC Industries Milling, Turning, Welding | Arlington, TX | MillingTurningWelding | - |
| Fulcrum Technologies Inc Milling, Laser, Waterjet, Bending, Welding, Finishing | Tualatin, OR | MillingLaserWaterjetBendingWeldingFinishing | - |
| Fuller Group of NW Florida Milling, Turning, Casting | Crestview, FL | MillingTurningCasting | - |
| Fulton Technology Corp Milling, Turning, Swiss, Laser, Welding, Finishing · ISO 9001 | Mooresboro, NC | MillingTurningSwissLaserWeldingFinishing | ISO 9001 |
| Fundom Enterprises Inc Milling, Turning, EDM, Grinding | Oklahoma City, OK | MillingTurningEDMGrinding | - |
| Fusion Babbitting Co, Inc Milling, Turning, Casting | Milwaukee, WI | MillingTurningCasting | - |
| Fusion Laser Services LLC Milling, Laser | Sterling Heights, MI | MillingLaser | - |
| Futr Applications LLC Milling | Jackson, MI | Milling | - |
| G & M Manufacturing Corp Milling, Waterjet, Stamping, EDM, Finishing · ISO 9001 | Crystal Lake, IL | MillingWaterjetStampingEDMFinishing | ISO 9001 |
| G M J Machine Co, Inc Milling, Turning, Finishing · AS9100, ITAR | Wilmer, AL | MillingTurningFinishing | AS9100, ITAR |
| Gaishin Manufacturing Milling, Turning · AS9100, ISO 13485 | Benton Harbor, MI | MillingTurning | AS9100, ISO 13485 |
| Galaxy Precision Inc Milling, Turning, Swiss, Welding · ISO 9001 | Albany, MN | MillingTurningSwissWelding | ISO 9001 |
| Gardner Precision Technologies LLC Milling, Turning, Welding | Forest Hill, TX | MillingTurningWelding | - |
| Garner Machine, L.L.C Milling, Turning, Swiss | Salt Lake City, UT | MillingTurningSwiss | - |
| Gartom CNC, Inc. Milling, Turning, Welding | Rochester, NY | MillingTurningWelding | - |
| GC Machining, Inc. Milling, Turning · ISO 9001, AS9100, ITAR | Stockton, CA | MillingTurning | ISO 9001, AS9100, ITAR |
| GCG Industries Inc Milling, Turning · ISO 9001, AS9100, ISO 13485 | Fort Wayne, IN | MillingTurning | ISO 9001, AS9100, ISO 13485 |
| GD&T Manufacturing, LLC Milling, Turning, Grinding, Finishing | Azle, TX | MillingTurningGrindingFinishing | - |
| Gemini Manufacturing & Engineering Inc Milling, Laser, Punching, Welding, Finishing · ISO 9001 | Anaheim, CA | MillingLaserPunchingWeldingFinishing | ISO 9001 |
| General Grinding & Mfg Co LLC Milling, Turning, Welding, Grinding, Finishing · ISO 9001, AS9100 | La Mirada, CA | MillingTurningWeldingGrindingFinishing | ISO 9001, AS9100 |
| General Machine Milling, Turning, Laser, Waterjet, Punching, Bending, Welding, Grinding, Finishing | Chicago, IL | MillingTurningLaserWaterjetPunchingBendingWeldingGrindingFinishing | - |
| General Machine Co Inc Milling, Grinding · ISO 9001, AS9100 | Bristol, CT | MillingGrinding | ISO 9001, AS9100 |
| General Manufacturing Co Milling, Turning, Finishing, Assembly · ISO 9001, ITAR | Bethel Park, PA | MillingTurningFinishingAssembly | ISO 9001, ITAR |
| General Plug and Manufacturing Co Milling, Casting, EDM, Grinding, Finishing · ISO 9001 | Oberlin, OH | MillingCastingEDMGrindingFinishing | ISO 9001 |
| General Research & Manufacturing Milling, Turning · ISO 9001, AS9100, ITAR | Torrance, CA | MillingTurning | ISO 9001, AS9100, ITAR |
| Genesee Global Group, Inc Milling, Laser, Bending, Welding, Stamping, Finishing, Assembly · ISO 9001 | W Henrietta, NY | MillingLaserBendingWeldingStampingFinishingAssembly | ISO 9001 |
| Genesis Custom Machining LLC Milling | Warren, OH | Milling | - |
| Genesis Precision LLC Milling, Turning, Grinding, Finishing | Phoenix, AZ | MillingTurningGrindingFinishing | - |
| Genesys Industries Inc Milling, Turning, Swiss, Casting, Finishing · ISO 9001 | Ellenton, FL | MillingTurningSwissCastingFinishing | ISO 9001 |
| Genfor Precision Components Limited Milling, Turning, Swiss | Chanhassen, MN | MillingTurningSwiss | - |
| Gibbs Precision Machine, Inc Milling, Turning · ISO 9001 | Chandler, AZ | MillingTurning | ISO 9001 |
| Gil-Mar & Associates Inc Milling, Turning, Swiss, Welding, EDM, Grinding, Finishing, Assembly | Garland, TX | MillingTurningSwissWeldingEDMGrindingFinishingAssembly | - |
| Gilberts Precision Machine Inc Milling, Turning, Bending, Welding · ISO 9001 | Las Vegas, NV | MillingTurningBendingWelding | ISO 9001 |
| Global Correlations Inc Milling, Turning, Grinding | Miami, FL | MillingTurningGrinding | - |