| Falcon Sheet Metal, Inc Laser, Punching, Welding, Finishing | North Salt Lake, UT | LaserPunchingWeldingFinishing | - |
| Falso Industries Inc Laser, Punching, Bending, Welding, Finishing | Syracuse, NY | LaserPunchingBendingWeldingFinishing | - |
| Fastech Precision LLC Milling, Turning, Laser, Waterjet, Bending, Welding · ITAR, CMMC | Bedford, IN | MillingTurningLaserWaterjetBendingWelding | ITAR, CMMC |
| FH Peterson Machine Corp Milling, Turning, Welding, Grinding · ISO 9001, ITAR | Stoughton, MA | MillingTurningWeldingGrinding | ISO 9001, ITAR |
| First Quality Fabricating Inc. Bending, Laser, Welding | Dallas, TX | BendingLaserWelding | - |
| Florida Metal Stampings Inc Laser, Welding, Stamping, EDM · ISO 9001, ITAR | Seminole, FL | LaserWeldingStampingEDM | ISO 9001, ITAR |
| Focus Manufacturing Services Laser, Waterjet, Bending, Welding · ISO 9001 | Ogden, UT | LaserWaterjetBendingWelding | ISO 9001 |
| Forceco LLC Welding · ITAR | Saginaw, MI | Welding | ITAR |
| Fort Walton Machining Inc Milling, Turning, Waterjet, Welding, EDM, Grinding, Finishing · ITAR | Fort Walton Beach, FL | MillingTurningWaterjetWeldingEDMGrindingFinishing | ITAR |
| Foundrion Group Welding, Casting | Mills, WY | WeldingCasting | - |
| Fox Valley Metal Fab, Inc. Milling, Bending, Welding | Appleton, WI | MillingBendingWelding | - |
| Foxtrot Customs Laser, Welding | Converse, TX | LaserWelding | - |
| Franco Machine Milling, Turning, Welding · AS9100, ITAR | Loma, CO | MillingTurningWelding | AS9100, ITAR |
| Franklin’s Industries Milling, Turning, Waterjet, Welding, EDM · ISO 9001, AS9100 | Poway, CA | MillingTurningWaterjetWeldingEDM | ISO 9001, AS9100 |
| Fredon Corp Milling, Turning, Welding, EDM, Grinding · ISO 9001, AS9100, ITAR, NADCAP | Mentor, OH | MillingTurningWeldingEDMGrinding | ISO 9001, AS9100, ITAR, NADCAP |
| Freedom Security, LLC Waterjet, Punching, Bending, Welding, Finishing | Salt Lake City, UT | WaterjetPunchingBendingWeldingFinishing | - |
| Futuristics Machine, Inc. Welding · ISO 9001 | San Diego, CA | Welding | ISO 9001 |
| Fze Manufacturing Solutions, LLC Milling, Swiss, Welding, Finishing, Assembly | North Fond Du Lac, WI | MillingSwissWeldingFinishingAssembly | - |
| G & D Machine Shop Inc Waterjet, Bending, Welding, Finishing | Hammond, LA | WaterjetBendingWeldingFinishing | - |
| G & G Steel Inc Milling, Turning, Welding, Grinding | Russellville, AL | MillingTurningWeldingGrinding | - |
| G & R Manufacturing Welding, Stamping, Finishing, Assembly · ISO 9001, ITAR | Naugatuck, CT | WeldingStampingFinishingAssembly | ISO 9001, ITAR |
| G & R Metals Milling, Turning, Punching, Bending, Welding, EDM · CMMC | Hampton, VA | MillingTurningPunchingBendingWeldingEDM | CMMC |
| Galaxy Tool Corp Milling, Welding, EDM, Grinding, Assembly · ISO 9001, AS9100 | Winfield, KS | MillingWeldingEDMGrindingAssembly | ISO 9001, AS9100 |
| Gamlet Inc Milling, Laser, Bending, Welding, Stamping, Grinding, Finishing | York, PA | MillingLaserBendingWeldingStampingGrindingFinishing | - |
| Gardner Precision Technologies LLC Milling, Turning, Welding | Forest Hill, TX | MillingTurningWelding | - |
| Gartom CNC, Inc. Milling, Turning, Welding | Rochester, NY | MillingTurningWelding | - |
| Gause Tool, Inc Turning, Welding, Grinding | Goldendale, WA | TurningWeldingGrinding | - |
| GC International Inc Milling, Turning, Welding, Casting, Assembly · AS9100, NADCAP | Camarillo, CA | MillingTurningWeldingCastingAssembly | AS9100, NADCAP |
| Gem City Metal Technologies, LLC Milling, Laser, Punching, Bending, Welding, Stamping · AS9100, NADCAP | Dayton, OH | MillingLaserPunchingBendingWeldingStamping | AS9100, NADCAP |
| Gen3 Aerospace, LLC Bending, Welding | Tempe, AZ | BendingWelding | - |
| Gene Davis Sales & Services Laser, Welding, Waterjet | Erie, PA | LaserWeldingWaterjet | - |
| General Machine Milling, Turning, Laser, Waterjet, Punching, Bending, Welding, Grinding, Finishing | Chicago, IL | MillingTurningLaserWaterjetPunchingBendingWeldingGrindingFinishing | - |
| Genesee Global Group, Inc Milling, Laser, Bending, Welding, Stamping, Finishing, Assembly · ISO 9001 | W Henrietta, NY | MillingLaserBendingWeldingStampingFinishingAssembly | ISO 9001 |
| Gilberts Precision Machine Inc Milling, Turning, Bending, Welding · ISO 9001 | Las Vegas, NV | MillingTurningBendingWelding | ISO 9001 |
| Gill Metal Fab Inc Welding | Brockton, MA | Welding | - |
| Glemco Inc Milling, Waterjet, Welding, EDM, Grinding · ISO 9001, AS9100, ITAR | Leander, TX | MillingWaterjetWeldingEDMGrinding | ISO 9001, AS9100, ITAR |
| Global Affinity Inc Laser, Bending, Welding | Bristol, PA | LaserBendingWelding | - |
| Global Precision Manufacturing Milling, Turning, Welding, Assembly · ISO 9001, ITAR | Grass Valley, CA | MillingTurningWeldingAssembly | ISO 9001, ITAR |
| Glsv Inc Milling, Turning, Waterjet, Bending, Welding · ISO 9001 | Calumet, MI | MillingTurningWaterjetBendingWelding | ISO 9001 |
| GMP Welding & Fabrication, Inc. Bending, Welding | Cincinnati, OH | BendingWelding | - |
| GP Manufacturing Milling, Turning, Welding, EDM, Grinding, Assembly · ISO 9001 | Buchanan, MI | MillingTurningWeldingEDMGrindingAssembly | ISO 9001 |
| Gray Machine Company LLC Welding | Billings, MT | Welding | - |
| Great Lakes Pressed Steel Corporation Bending, Welding, Stamping | Buffalo, NY | BendingWeldingStamping | - |
| Great Lakes Stainless Inc Laser, Welding | Traverse City, MI | LaserWelding | - |
| Greene Machine & Manufacturing Inc Milling, Turning, Laser, Waterjet, Welding · ISO 9001, AS9100 | Macon, GA | MillingTurningLaserWaterjetWelding | ISO 9001, AS9100 |
| Grisham Industries Inc. Milling, Turning, Bending, Welding | Davenport, IA | MillingTurningBendingWelding | - |
| Group Manufacturing Services Inc Milling, Turning, Laser, Punching, Bending, Welding, Assembly · ISO 9001 | San Jose, CA | MillingTurningLaserPunchingBendingWeldingAssembly | ISO 9001 |
| GST Manufacturing, Ltd Turning, Laser, Waterjet, Punching, Bending, Welding, Stamping, Finishing, Assembly | Haltom City, TX | TurningLaserWaterjetPunchingBendingWeldingStampingFinishingAssembly | - |
| Gtscientific LLC Milling, Turning, Laser, Welding, Grinding | Honolulu, HI | MillingTurningLaserWeldingGrinding | - |
| Gurecky Manufacturing Service, Inc Milling, Turning, Welding, EDM, Assembly · ISO 9001 | Rosenberg, TX | MillingTurningWeldingEDMAssembly | ISO 9001 |