| Bula Forge & Machine Inc Milling, Turning, Welding, Forging, Assembly · ISO 9001 | Cleveland, OH | MillingTurningWeldingForgingAssembly | ISO 9001 |
| Bullet Fabrication LLC Milling, Bending, Welding | Gardena, CA | MillingBendingWelding | - |
| Burgess Specialty Fabricating Inc Milling, Turning, Laser, Waterjet, Punching, Bending, Welding, EDM, Grinding, Finishing | Houston, TX | MillingTurningLaserWaterjetPunchingBendingWeldingEDMGrindingFinishing | - |
| Burns Machine Co Milling, Turning, Bending, Welding, Grinding, Assembly · ISO 9001 | Ottawa, IL | MillingTurningBendingWeldingGrindingAssembly | ISO 9001 |
| Busch Brothers Milling, Turning, Swiss, Finishing | New Prague, MN | MillingTurningSwissFinishing | - |
| Butler Precision Technologies LLC Milling, Turning, Welding, Finishing · AS9100, ITAR | Bristol, PA | MillingTurningWeldingFinishing | AS9100, ITAR |
| C & C Machine Inc Milling, Turning, Bending, Welding | La Crosse, WI | MillingTurningBendingWelding | - |
| C & F Tool & Die Milling, Turning, Welding · ISO 9001, AS9100, ITAR | San Antonio, TX | MillingTurningWelding | ISO 9001, AS9100, ITAR |
| C & S Machine & Manufacturing Corp Milling, Turning, Laser, Bending, Welding · ISO 9001, AS9100 | Louisville, KY | MillingTurningLaserBendingWelding | ISO 9001, AS9100 |
| C & S Machine Products Inc Milling, Turning, Swiss, EDM, Grinding · AS9100, NADCAP, ISO 13485 | Niles, MI | MillingTurningSwissEDMGrinding | AS9100, NADCAP, ISO 13485 |
| C & T Industrial Machine Shop, Inc Milling, Turning, Waterjet, Welding | Byron, GA | MillingTurningWaterjetWelding | - |
| C + C Mfg Milling, Bending, Welding, Grinding, Finishing | Garden City, ID | MillingBendingWeldingGrindingFinishing | - |
| C&C Fabrication Co Milling, Turning, Laser, Waterjet, Punching, Bending, Welding, Grinding, Finishing, Assembly | Laceys Spring, AL | MillingTurningLaserWaterjetPunchingBendingWeldingGrindingFinishingAssembly | - |
| 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 Machining Milling, Welding · ITAR | Kentwood, MI | MillingWelding | ITAR |
| Cad Enterprises, Inc Milling, Swiss, Waterjet, Welding, EDM, Grinding | Phoenix, AZ | MillingSwissWaterjetWeldingEDMGrinding | - |
| Cadillac Fabrication Inc Milling, Bending, Welding, Casting · ISO 9001 | Cadillac, MI | MillingBendingWeldingCasting | ISO 9001 |
| Cal Machine & Manufacturing LLC Milling, Turning, Welding, Assembly · ISO 9001, AS9100 | Chino, CA | MillingTurningWeldingAssembly | ISO 9001, AS9100 |
| California Lasers Inc Milling, Laser, Welding, EDM, Grinding | Simi Valley, CA | MillingLaserWeldingEDMGrinding | - |
| Calisota Parts, LLC Milling, Waterjet, Stamping, EDM | Frankfort, IL | MillingWaterjetStampingEDM | - |
| Calrod Engineering, LLC Milling, Turning, Welding · ISO 9001, AS9100, ITAR | Costa Mesa, CA | MillingTurningWelding | ISO 9001, AS9100, ITAR |
| 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 |
| Caran Precision Engineering & Manufacturing Corp Milling, Turning, Swiss, Welding, Stamping, EDM, Grinding, Assembly · ISO 9001, IATF 16949 | Brea, CA | MillingTurningSwissWeldingStampingEDMGrindingAssembly | ISO 9001, IATF 16949 |
| 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 |
| Casemer Tool & Machine Inc Milling, Turning, Laser, Waterjet, Welding, EDM, Grinding | Oxford, MI | MillingTurningLaserWaterjetWeldingEDMGrinding | - |
| Cassavant Machining, LLC Milling, Turning, Swiss, Welding, EDM, Grinding, Finishing · ISO 9001, AS9100 | Phoenix, AZ | MillingTurningSwissWeldingEDMGrindingFinishing | ISO 9001, AS9100 |
| CBM Fabrication Inc Milling, Turning, Waterjet, Welding, EDM, Grinding, Finishing | Ballston Lake, NY | MillingTurningWaterjetWeldingEDMGrindingFinishing | - |
| CCT Enterprises, LLC Milling, Turning, Swiss, Stamping, EDM, Assembly · ISO 9001, AS9100, ITAR, IATF 16949, CMMC | Auburn, IN | MillingTurningSwissStampingEDMAssembly | ISO 9001, AS9100, ITAR, IATF 16949, CMMC |
| Center Machine Inc Milling, Turning, Bending, Welding | Center, ND | MillingTurningBendingWelding | - |
| Center Tool Co Milling, Turning, Welding, Stamping, EDM, Grinding · ISO 9001 | Hampshire, IL | MillingTurningWeldingStampingEDMGrinding | ISO 9001 |
| Centerline Engineered Solutions, Inc Milling, Turning, Laser, Bending, Welding · ISO 9001 | Greenwood, SC | MillingTurningLaserBendingWelding | ISO 9001 |
| Central Precision Inc Milling, Laser, Punching, Bending, Welding, Grinding, Finishing · ISO 9001 | Boonsboro, MD | MillingLaserPunchingBendingWeldingGrindingFinishing | ISO 9001 |
| Central Valley Machine Inc Milling, Turning, Waterjet, Bending, Welding, EDM · AS9100, ITAR | Logan, UT | MillingTurningWaterjetBendingWeldingEDM | AS9100, ITAR |
| Century Metal Spinning Co Milling, Turning, Laser, Bending, Welding, Finishing · ISO 9001, AS9100, ITAR | Bensenville, IL | MillingTurningLaserBendingWeldingFinishing | ISO 9001, AS9100, ITAR |
| Century Tool Co Inc Milling, Turning, Welding, EDM, Grinding | Thompson, CT | MillingTurningWeldingEDMGrinding | - |
| Century Tool Inc Milling, Welding, EDM, Grinding, Finishing, Assembly · ISO 9001 | Rogers, MN | MillingWeldingEDMGrindingFinishingAssembly | ISO 9001 |
| Cerven Solutions, Inc Milling, Finishing · ISO 9001, AS9100, ITAR, CMMC | Arlington, NY | MillingFinishing | ISO 9001, AS9100, ITAR, CMMC |
| Charles Meisner, Inc Milling, Turning, Bending, Welding, Stamping, EDM, Grinding · ISO 9001, AS9100 | Upland, CA | MillingTurningBendingWeldingStampingEDMGrinding | ISO 9001, AS9100 |
| Charlie Mike Manufacturing LLC Milling, Turning, Laser, Bending, Welding, Stamping, EDM, Finishing | Oakdale, PA | MillingTurningLaserBendingWeldingStampingEDMFinishing | - |
| Checkered Past Machine Milling, Turning, Welding, Grinding · ISO 9001, CMMC | Brownsburg, IN | MillingTurningWeldingGrinding | ISO 9001, CMMC |
| Cherry Creek Machine, LLC Milling, Turning, Waterjet, Welding · ISO 9001 | Tulsa, OK | MillingTurningWaterjetWelding | ISO 9001 |
| Chesapeake Machine Co Milling, Welding | Baltimore, MD | MillingWelding | - |
| Chicago CNC Machining Co. Milling, Turning, Bending, Welding | Hodgkins, IL | MillingTurningBendingWelding | - |
| Chick Machine Company, LLC Milling, Turning, Waterjet, Grinding, Finishing · ISO 9001, AS9100, ITAR | Butler, PA | MillingTurningWaterjetGrindingFinishing | ISO 9001, AS9100, ITAR |
| Churchmen's Machine Company Milling, Turning, Laser, Waterjet, Welding, Grinding, Finishing | North East, MD | MillingTurningLaserWaterjetWeldingGrindingFinishing | - |
| CJ Precision Machine Inc Milling, Turning, Welding, Finishing · ISO 9001 | Boise, ID | MillingTurningWeldingFinishing | ISO 9001 |
| Class A Tooling Inc Milling, Turning, Bending, Welding, Stamping, EDM, Grinding | Cabot, AR | MillingTurningBendingWeldingStampingEDMGrinding | - |
| Classic Engineering, LLC Milling, Turning, Waterjet, Welding, Finishing | Gloucester, MA | MillingTurningWaterjetWeldingFinishing | - |