| DSDw-national Standard-niles, LLC | Niles | MI | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| EFEureka Foundry Company | Chattanooga | TN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| AMAllied Metal CO | Chicago | IL | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| AFAmerican Foundry Group / American Alloy Ii | Muskogee | OK | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| AFAmerican Foundry Group LLC - Bixby | Bixby | OK | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| BABermco Aluminum | Birmingham | AL | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| BMBull Moose Tube CO - Masury Plant | Masury | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| CRCast Rite CORP | Gardena | CA | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| CPCharlotte Pipe and Foundry Company | Charlotte | NC | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CCColeman Cable INC | Waukegan | IL | Primary Metal Manufacturing331422 | — | ◇ UNVERIFIED |
 Dubose Strapping Inc.-treatment Plant #1 | Crawfordsville | IN | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| DIDynamet INC | Clearwater | FL | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| FFFalcon Foundry CO | Lowellville | OH | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| GTGoulds Turbine Foundry | Slaton | TX | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| JJJ J Ryan Corporation Southington Galvanize Division | Plantsville | CT | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| JCJohnson Controls Battery Group INC | Florence | SC | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| KPKeokuk Prototype Foundry Company, INC. | Kahoka | MO | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| LHL & H Threaded Rods CORP | Dayton | OH | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| MMagnode | Trenton | OH | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| MUMarcegaglia USA Munhall Plant | Munhall | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MTMelling Tool Company | Battle Creek | MI | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| MCMueller Copper Tube West CO. | Cedar City | UT | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| PFProspect Foundry LLC | Minneapolis | MN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| RCReliable Castings CORP | Sidney | OH | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| RCRock Creek Aluminum INC | Rock Creek | OH | Primary Metal Manufacturing331312 | — | ◇ UNVERIFIED |
| SASkana Aluminum Company | Clarksburg | WV | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| SASlw Automotive INC / Sallisaw Plt | Sallisaw | OK | Primary Metal Manufacturing331523 | — | ◇ UNVERIFIED |
| SKSteel King Industries | Rome | GA | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| UEUmicore Electrical Materials USA INC | Attleboro | MA | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| WCWall Colmonoy CORP CORP Los Lumas Plant | Los Lunas | NM | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| ACAcra Cast INC | Bay City | MI | Primary Metal Manufacturing331512 | — | ◇ UNVERIFIED |
| ACAlgonac Cast Products INC | Algonac | MI | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| AMAlphi Manufacturing INC | Jonesville | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| AAlsco | Portland | OR | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| AWAluminum Wheel Technologies INC | Ravenna | OH | Primary Metal Manufacturing331315 | — | ◇ UNVERIFIED |
| AWArcelormittal Warren | Warren | OH | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| ASArlington Structural Steel | Arlington Heights | IL | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| AFAtlas Founders INC | Agawam | MA | Primary Metal Manufacturing331522 | — | ◇ UNVERIFIED |
| APAvalon Precision Metalsmiths | Cleveland | OH | Primary Metal Manufacturing331512 | — | ◇ UNVERIFIED |
| BSBarber Steel Foundry Corporation | Rothbury | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BABorbet Alabama INC | Auburn | AL | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| CPCastwell Products INC | Skokie | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| EAEnkei America, INC | Jacksonville | FL | Primary Metal Manufacturing331523 | — | ◇ UNVERIFIED |
| ECEnterprise Casting Corporation | Lewiston | ME | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| GMGlobe Metallurgical INC | Niagara Falls | NY | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| HIHardsteel, INC. | Tuscaloosa | AL | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| HHoneywell | San Diego | CA | Primary Metal Manufacturing331312 | — | ◇ UNVERIFIED |
| IPIntermountain Precision Castin | Lindon | UT | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| JFJorgensen Forge CORP | Tukwila | WA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| MFMaddox Foundry & Machine Works, LLC | Archer | FL | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
