| Lakecity Industries Holding Inc Finishing | Lake City, PA | Finishing | - |
| Air-Lake Machine Milling, Turning, Welding | Lakeville, MN | MillingTurningWelding | - |
| Lake Precision Machine Inc Turning, Welding | Hagerstown, MD | TurningWelding | - |
| Lakecraft, Inc Turning, Bending, Welding, Grinding, Finishing | Port Clinton, OH | TurningBendingWeldingGrindingFinishing | - |
| Lakehouse Industries Milling, Turning, Finishing | Woodland, WA | MillingTurningFinishing | - |
| Lakeside Innovative Technologies Milling, Turning, Finishing · ISO 9001, ITAR | Chittenango, NY | MillingTurningFinishing | ISO 9001, ITAR |
| Lakeview Forge Co Forging · ITAR | Erie, PA | Forging | ITAR |
| Spring Creek Machining, Inc Milling, Turning, Waterjet, Bending, Welding, EDM, Grinding, Finishing | Lowell, AR | MillingTurningWaterjetBendingWeldingEDMGrindingFinishing | - |
| Springs Fabrication, LLC Bending, Welding, Waterjet · ISO 9001, ITAR | Colorado Springs, CO | BendingWeldingWaterjet | ISO 9001, ITAR |
| Lakes Area Manufacturing Co Milling, Grinding | Shafer, MN | MillingGrinding | - |
| Springfield Tool and Die Milling, Turning, Grinding, Assembly | Duncan, SC | MillingTurningGrindingAssembly | - |
| Blake Machine Milling, Turning, Welding | Phoenix, AZ | MillingTurningWelding | - |
| Interlake Stamping of Ohio Inc Stamping, Assembly | Willoughby, OH | StampingAssembly | - |
| Midlake Products & Mfg. Co., Inc Turning, Bending, Laser, Welding, Stamping | Canton, OH | TurningBendingLaserWeldingStamping | - |
| Overlake Manufacturing, Inc Milling, Turning, Swiss | New London, OH | MillingTurningSwiss | - |
| Ruhl Inc Milling, Turning, Waterjet, Welding, Grinding | Spring Lake, NC | MillingTurningWaterjetWeldingGrinding | - |
| Stanley Spring and Stamping Corp Laser, Bending, Stamping, Assembly | Chicago, IL | LaserBendingStampingAssembly | - |
| Thomas W Springer Inc Milling, Turning, Swiss, Welding, Grinding · ISO 9001 | Landenberg, PA | MillingTurningSwissWeldingGrinding | ISO 9001 |
| V-Lake Industries Milling, Turning · ISO 9001 | Buffalo, NY | MillingTurning | ISO 9001 |
| Avid Manufacturing LLC Milling, Assembly | Springfield, OH | MillingAssembly | - |
| Campbell Engineering Milling, Welding, EDM, Finishing, Assembly · ISO 9001, ITAR | Lake Forest, CA | MillingWeldingEDMFinishingAssembly | ISO 9001, ITAR |
| Great Lakes Castings Casting, Grinding · ISO 9001, IATF 16949 | Ludington, MI | CastingGrinding | ISO 9001, IATF 16949 |
| Great Lakes Metal Finishing LLC Finishing | Jackson, MI | Finishing | - |
| Great Lakes Stainless Inc Laser, Welding | Traverse City, MI | LaserWelding | - |
| JC Machine, Inc Milling, Turning, Swiss, Laser, Bending, Welding | Lakeland, FL | MillingTurningSwissLaserBendingWelding | - |
| Mdi Manufacturing Inc Milling, Turning, Welding, Grinding, Assembly · ISO 9001 | Lakewood, NJ | MillingTurningWeldingGrindingAssembly | ISO 9001 |
| Northlake Steel Corp Turning, Forging, Grinding, Finishing | Valley City, OH | TurningForgingGrindingFinishing | - |
| Red Cliff Precision LLC Milling, Turning · ITAR | Spring, TX | MillingTurning | ITAR |
| Rose Metal Products Inc. Bending, Laser, Welding, Stamping | Springfield, MO | BendingLaserWeldingStamping | - |
| S & R Tool, Inc Milling, Turning, Welding, EDM · AS9100 | Lakeville, NY | MillingTurningWeldingEDM | AS9100 |
| Spring Grove Sheet Metal Bending, Laser, Welding | Cincinnati, OH | BendingLaserWelding | - |
| Accudynamics LLC Assembly · ISO 9001, AS9100, ITAR, ISO 13485 | Lakeville, MA | Assembly | ISO 9001, AS9100, ITAR, ISO 13485 |
| American Fab Milling, Laser, Bending, Welding | Spring Lake, MI | MillingLaserBendingWelding | - |
| Bland Brothers Enterprises Milling, Welding, Assembly | Springfield, IL | MillingWeldingAssembly | - |
| Custom Manufacturing & Polishing Inc Waterjet, Welding | Springfield, MO | WaterjetWelding | - |
| Custom Metalcraft Milling, Bending, Welding | Springfield, MO | MillingBendingWelding | - |
| DRM Industries Corp Milling, Turning, Laser, Welding, Casting · ISO 9001 | Lake Delton, WI | MillingTurningLaserWeldingCasting | ISO 9001 |
| Dynamic Marine Machining Welding | Spring Valley, CA | Welding | - |
| Electro Mechanical Products Assembly · ISO 9001 | Lakewood, CO | Assembly | ISO 9001 |
| Ferrera Tooling Inc Milling · ITAR, CMMC | Lakeland, FL | Milling | ITAR, CMMC |
| Great Lakes Metal Finishing Inc Finishing | Erie, PA | Finishing | - |
| Heimaster Metal Works Inc Bending, Welding | Lakeside, CA | BendingWelding | - |
| Hi Performance Machine & Metals, Inc Milling, Turning, Waterjet, EDM · ISO 9001 | Lakeside, CA | MillingTurningWaterjetEDM | ISO 9001 |
| Inno-Tec Welding & Fabrication LLC Welding | Springfield, OH | Welding | - |
| JRS Precision Machine & Design LLC Milling, Turning | Lakeville, MA | MillingTurning | - |
| Krametech, Inc Milling, Finishing, Assembly | Lake Zurich, IL | MillingFinishingAssembly | - |
| LC Manufacturing LLC Milling, Forging · ISO 9001, IATF 16949 | Lake City, MI | MillingForging | ISO 9001, IATF 16949 |
| Mercury Machine Works LLC Milling, Turning, Laser, Finishing · ISO 9001, ITAR | Spring, TX | MillingTurningLaserFinishing | ISO 9001, ITAR |
| Metron Machining LLC Milling, Metal AM · AS9100, ITAR, CMMC | Lakewood, CO | MillingMetal AM | AS9100, ITAR, CMMC |
| Minic Precision, Inc Turning, Swiss · ISO 9001 | Spring Grove, IL | TurningSwiss | ISO 9001 |