| Burton Industries Inc Milling, Turning, Stamping, Grinding · ISO 9001, AS9100, IATF 16949 | Mentor, OH | MillingTurningStampingGrinding | ISO 9001, AS9100, IATF 16949 |
| Butler Precision Technologies LLC Milling, Turning, Welding, Finishing · AS9100, ITAR | Bristol, PA | MillingTurningWeldingFinishing | AS9100, ITAR |
| Bvi Machining, Inc Milling | Houston, TX | Milling | - |
| Byers Precision Fabricators, Inc Milling, Laser, Bending, Welding · ISO 9001 | Hendersonville, NC | MillingLaserBendingWelding | ISO 9001 |
| C & C Machine Inc Milling, Turning, Bending, Welding | La Crosse, WI | MillingTurningBendingWelding | - |
| C & C Machining, Inc Milling, Turning, EDM, Grinding, Finishing | Hayward, CA | MillingTurningEDMGrindingFinishing | - |
| C & P Machine Welding | Fort Wayne, IN | Welding | - |
| C & S Machine & Manufacturing Corp Milling, Turning, Laser, Bending, Welding · ISO 9001, AS9100 | Louisville, KY | MillingTurningLaserBendingWelding | ISO 9001, AS9100 |
| C & T Industrial Machine Shop, Inc Milling, Turning, Waterjet, Welding | Byron, GA | MillingTurningWaterjetWelding | - |
| C and C Machining LLC Milling, Turning, Assembly | Fort Worth, TX | MillingTurningAssembly | - |
| C M Engineering Inc Milling, Laser, Bending, Welding, Finishing, Assembly · ISO 9001 | Dugger, IN | MillingLaserBendingWeldingFinishingAssembly | ISO 9001 |
| C P Precision Inc Milling, Finishing | Warminster, PA | MillingFinishing | - |
| C S Guenzel Co Bending, Welding | Lincoln, NE | BendingWelding | - |
| C.E. Machine Company, Inc. Milling, Waterjet, Metal AM · ISO 9001, AS9100 | Wichita, KS | MillingWaterjetMetal AM | ISO 9001, AS9100 |
| C.N.C. Machine Products, Inc Milling, Turning · ISO 9001 | Joplin, MO | MillingTurning | ISO 9001 |
| C.V. Industries Milling, Turning, EDM | Southington, CT | MillingTurningEDM | - |
| C&M Precision Tech Milling, Turning, Swiss, Welding, EDM, Grinding, Finishing · ISO 9001, AS9100, ITAR, ISO 13485, CMMC | Hudson, NH | MillingTurningSwissWeldingEDMGrindingFinishing | ISO 9001, AS9100, ITAR, ISO 13485, CMMC |
| C2 Machine, LLC Milling, Turning, EDM, Grinding, Assembly | Joelton, TN | MillingTurningEDMGrindingAssembly | - |
| C2 Machining Milling, Welding · ITAR | Kentwood, MI | MillingWelding | ITAR |
| Cad Enterprises, Inc Milling, Swiss, Waterjet, Welding, EDM, Grinding | Phoenix, AZ | MillingSwissWaterjetWeldingEDMGrinding | - |
| Cal Machine & Manufacturing LLC Milling, Turning, Welding, Assembly · ISO 9001, AS9100 | Chino, CA | MillingTurningWeldingAssembly | ISO 9001, AS9100 |
| Cal Tech Precision Inc Milling, Turning | Anaheim, CA | MillingTurning | - |
| Calidad, Inc Casting · ISO 9001, AS9100, ITAR | Ontario, CA | Casting | ISO 9001, AS9100, ITAR |
| California Manufacturing Inc Milling, Turning, Laser, Punching, Bending, Welding · ISO 9001, AS9100, ITAR | Anaheim, CA | MillingTurningLaserPunchingBendingWelding | ISO 9001, AS9100, ITAR |
| Calrod Engineering, LLC Milling, Turning, Welding · ISO 9001, AS9100, ITAR | Costa Mesa, CA | MillingTurningWelding | ISO 9001, AS9100, ITAR |
| Camco Manufacturing Inc Milling, Turning, Grinding, Finishing · ISO 9001, AS9100 | Sayre, PA | MillingTurningGrindingFinishing | ISO 9001, AS9100 |
| Cameron Tool Corporation Milling, Bending, Welding, Waterjet, EDM, Stamping · ISO 9001 | Lansing, MI | MillingBendingWeldingWaterjetEDMStamping | ISO 9001 |
| Campbell Engineering Milling, Welding, EDM, Finishing, Assembly · ISO 9001, ITAR | Lake Forest, CA | MillingWeldingEDMFinishingAssembly | ISO 9001, ITAR |
| Camtool, Inc Stamping · ISO 9001, AS9100 | Muncie, IN | Stamping | ISO 9001, AS9100 |
| Canady Manufacturing Co Inc Milling, Turning, EDM, Grinding · ISO 9001 | San Fernando, CA | MillingTurningEDMGrinding | ISO 9001 |
| Canyon Run Engineering Technologies Milling, Turning, EDM, Grinding, Assembly | Troy, OH | MillingTurningEDMGrindingAssembly | - |
| Capital Industries Inc Laser, Punching, Bending, Welding, Finishing · ISO 9001 | Seattle, WA | LaserPunchingBendingWeldingFinishing | ISO 9001 |
| Caps Machine and Tool, LLC Milling, Turning | Ponder, TX | MillingTurning | - |
| Caran Precision Engineering & Manufacturing Corp Milling, Turning, Swiss, Welding, Stamping, EDM, Grinding, Assembly · ISO 9001, IATF 16949 | Brea, CA | MillingTurningSwissWeldingStampingEDMGrindingAssembly | ISO 9001, IATF 16949 |
| Cardinal Metal Works LLC Welding, Assembly · ISO 9001 | Burgaw, NC | WeldingAssembly | ISO 9001 |
| Carlisle Machine Works Inc Milling, Turning, Bending, Welding, EDM, Grinding | Millville, NJ | MillingTurningBendingWeldingEDMGrinding | - |
| Carlson Metal Products Inc Punching, Bending, Welding, Finishing, Assembly | Troy, MI | PunchingBendingWeldingFinishingAssembly | - |
| Carlson Tool & Manufacturing Corp Milling, Turning, EDM, Grinding | Cedarburg, WI | MillingTurningEDMGrinding | - |
| Carney Mfg LLC Milling | Beaumont, CA | Milling | - |
| Caron Precision Inc Turning · ISO 9001 | Kalamazoo, MI | Turning | ISO 9001 |
| Carpatians Manufacturing Corp Milling, Stamping, Finishing, Assembly · ISO 9001, AS9100 | Troy, MI | MillingStampingFinishingAssembly | ISO 9001, AS9100 |
| Carr Machine & Tool, Inc Milling, Grinding, Assembly · ISO 9001, ITAR, CMMC | Elk Grove Village, IL | MillingGrindingAssembly | ISO 9001, ITAR, CMMC |
| Carter Components LLC Milling, Turning | Pipe Creek, TX | MillingTurning | - |
| Carver Sheet Metal Works Inc Bending, Welding | Salt Lake City, UT | BendingWelding | - |
| Cascade Precision Inc Milling, Turning, Finishing · ISO 9001, AS9100, ITAR | Boring, OR | MillingTurningFinishing | ISO 9001, AS9100, ITAR |
| Casco Machining Inc. Milling, Turning, Welding · ISO 9001 | San Jose, CA | MillingTurningWelding | ISO 9001 |
| Cass Precision Machining Turning · ISO 9001, AS9100, ITAR, CMMC | Brooklyn Center, MN | Turning | ISO 9001, AS9100, ITAR, CMMC |
| Cast Technologies Inc Casting | Peoria, IL | Casting | - |
| CB Machining & Engineering Inc Milling, Turning, Swiss · ISO 9001, AS9100, ITAR | Buffalo, MN | MillingTurningSwiss | ISO 9001, AS9100, ITAR |
| CB Manufacturing & Engineering Inc Milling, Turning, EDM · ISO 9001, AS9100 | Santa Ana, CA | MillingTurningEDM | ISO 9001, AS9100 |