| Kryton Engineered Metals, Inc. | Cedar Falls | IA | $0 |
| KSM Industries Inc. | Germantown | WI | Subcontractor |
| La Follette Machine & Tool Company, Inc. | La Follette | TN | $0 |
| Langdon Inc. | Cincinnati | OH | Subcontractor |
| Laptalo Enterprises, Inc. | San Jose | CA | Subcontractor |
| Lasasco Inc. | Boise | ID | $0 |
| Latitude Corp. | Verona | WI | Subcontractor |
| Laurel Sheet Metal Products, Inc. | N Hollywood | CA | Subcontractor |
| Leading Edge Manufacturing, L.L.C | Youngsville | LA | Subcontractor |
| Legacy Aerospace LLC | Corona | CA | Subcontractor |
| Lehi Sheet Metal Corporation | Westborough | MA | Subcontractor |
| Linden Steel & Construction, Inc. | Manteca | CA | Subcontractor |
| Lockheed Martin Corporation | Pinellas Park | FL | Subcontractor |
| L & T Precision, LLC | Poway | CA | Subcontractor |
| Machine And Fabrication Specialists, Inc. | Hampton | VA | Subcontractor |
| Magic Metals, Inc. | Palmer | AK | Subcontractor |
| Manufacturers Service Company, Incorporated | Woodbridge | CT | $0 |
| Mapp Technologies, L.L.C. | Joplin | MO | Subcontractor |
| Marathon Finishing Systems Inc. | Temecula | CA | Subcontractor |
| Mass Precision, Inc. | San Jose | CA | $0 |
| Mccorvey Sheet Metal Works, L.P. | Houston | TX | Subcontractor |
| Mcgill Airflow LLCStockton, CA · UEI MAGAQR7MMCE4 | Stockton | CA | $0 |
| Mcgill Airflow LLCFountain Inn, SC · UEI XCLJZLKZY7V5 | Fountain Inn | SC | $0 |
| M & E MFG. Co. Inc. | Kingston | NY | $0 |
| Merrick Construction Companies, Inc. | Louisville | KY | $0 |
| Merritt Island Air & Heat Inc. | Merritt Island | FL | Subcontractor |
| Metalbuilt LLC | Chesterfield | MI | Subcontractor |
| Metalcrafters, Inc. | Methuen | MA | Subcontractor |
| Metallion Industries, Inc. | Estacada | OR | $0 |
| Metal Roofing Systems Inc. | Stanley | NC | Subcontractor |
| Midwest Sheet Metal Co. | Springfield | MO | $0 |
| Mikron Manufacturing, Inc. | Colorado Springs | CO | Subcontractor |
| Miller Metal Fabrication Inc. | Bridgeville | DE | $0 |
| Minton & Roberson Inc. | Chesapeake | VA | Subcontractor |
| Mitchell Metals, LLC | Marietta | GA | Subcontractor |
| MJM Manufacturing Inc. | Miami Lakes | FL | Subcontractor |
| Ms Manufacturing LLC | Brazil | IN | Subcontractor |
| Muehlenkamp Properties, Inc. | Erlanger | KY | $0 |
| Murray's Sheet Metal Company Inc. | Parkersburg | WV | $0 |
| New Age Metal Fabricating Co. Inc. | Fairfield | NJ | Subcontractor |
| Nj Sullivan Company, Inc. | Manassas | VA | $0 |
| Noise Barriers LLC | North Aurora | IL | Subcontractor |
| Northeastern Precision Products Corporation | Bensalem | PA | Subcontractor |
| Nystrom Inc. | Brooklyn Park | MN | Subcontractor |
| Optima Stantron Corp. | Lawrenceville | GA | Subcontractor |
| Orion Industries | Auburn | WA | Subcontractor |
| Pacific Corrugated Pipe Company, LLC | Sacramento | CA | $0 |
| Pattison Metal Fab Inc. | Broken Arrow | OK | Subcontractor |
| Performance Metal Fabricators Inc. | Portsmouth | VA | Subcontractor |
| Pervan Tooling Company LLC | Compton | CA | Subcontractor |
| Pivot Corporation | Rowlett | TX | Subcontractor |
| Portland Sheet Metal Works Inc. | Clackamas | OR | $0 |
| Precise Industries Inc. | Brea | CA | Subcontractor |
| Precision Metal Products LLC | Phoenix | AZ | Subcontractor |
| Pride Metal Works LLC | Helena | MT | $0 |
| Prismier, LLC | Bolingbrook | IL | Subcontractor |
| Protocase Incorporated | Sydney | NS | Subcontractor |
| Proto Labs, Inc. | Nashua | NH | Subcontractor |
| P T Industries, Inc. | Signal Hill | CA | Subcontractor |
| Qaf Technologies Inc. | Columbus | OH | $0 |
| QTM Inc. | Oldsmar | FL | Subcontractor |
| R2G Enterprises, Inc. | Hayward | CA | Subcontractor |
| Race Crafters, LLC | Oxnard | CA | Subcontractor |
| Rack Solutions Inc. | Greenville | TX | Subcontractor |
| Rah Industries Inc. | Santa Clarita | CA | Subcontractor |
| Ramda Metal Specialties, Inc. | Gardena | CA | Subcontractor |
| Ravelin Defense Wi, LLC | Green Bay | WI | Subcontractor |
| RBH Aerospace, Inc. | Lakewood | CA | Subcontractor |
| Responsible Metal Fab Inc. | Sunnyvale | CA | Subcontractor |
| Rhinehart Development Corp. | Spencerville | IN | Subcontractor |
| Rodac, LLC | Ogden | UT | Subcontractor |
| Romco Contractors, Inc. | Bloomfield | CT | $0 |
| R-o MFG. Co. LLC | Fort Worth | TX | Subcontractor |
| Saginaw Control & Engineering Inc. | Saginaw | MI | Subcontractor |
| Samco Inc. | Bedford | IN | $0 |
| Savage Precision Fabrication, Inc. | Wylie | TX | Subcontractor |
| S&B Metal Products Of Twinsburg, LLC | Twinsburg | OH | Subcontractor |
| Scott & From Co. Inc. | Tacoma | WA | Subcontractor |
| Seconn Fabrication LLC | Waterford | CT | Subcontractor |
| Selective Industries, Inc. | Marine City | MI | Subcontractor |
| Service Metal Fabricators, Inc. | Williamsburg | VA | $0 |
| Sessa Sheet Metal Contractors, Inc. | Baltimore | MD | $0 |
| Sheet Metal Engineering | Simi Valley | CA | $0 |
| Shelton Industrial Pattern Inc. | Saint Louis | MO | Subcontractor |
| Southwest Greene International, Inc. | Oceanside | CA | Subcontractor |
| SSM Industries, Inc. | Pittsburgh | PA | Subcontractor |
| Stanford Precision, LLC | Farmers Branch | TX | $0 |
| Steeldyne Industries | Anaheim | CA | $0 |
| Steelhead Metal Corp. | Nampa | ID | Subcontractor |
| Stevenson Company, Inc. | Topeka | KS | $0 |
| Stromberg Metal Works Inc. | Beltsville | MD | Subcontractor |
| Superior Joining Technologies, Inc. | Machesney Park | IL | Subcontractor |
| Superior Steel, LLC | Eugene | OR | $0 |
| TDR Systems, Inc. | Waldorf | MD | Subcontractor |
| Techmar Corp. | Northridge | CA | $0 |
| Technical Metal Specialties Inc. | New Berlin | WI | Subcontractor |
| Technique, LLC | Jackson | MI | $0 |
| Tech-weld Inc. | Sycamore | IL | $0 |
| TFC Manufacturing Inc. | Lakewood | CA | Subcontractor |
| The Cincinnati Ventilating Company | Florence | KY | Subcontractor |
