| MGMetalplate Galvanizing, L.p. | Roanoke | LA | — | ◇ UNVERIFIED |
| MGMetalplate Galvanizing, L.p. (plant No. 2) | Birmingham | AL | — | ◇ UNVERIFIED |
| MUMetals USA Building Products, L. P. | Mesquite | TX | — | ◇ UNVERIFIED |
| MTMetal Technologies, Inc., Ravenna Ductile Iron | Ravenna | MI | — | ◇ UNVERIFIED |
| MTMetal Technologies INC -three Rivers Gray Iron | Three Rivers | MI | — | ◇ UNVERIFIED |
| MMetaltech/pgh | Pittsburgh | PA | — | ◇ UNVERIFIED |
| MVM&h Valve Company, a Division of Mcwane, LLC | Anniston | AL | — | ◇ UNVERIFIED |
| MMMichigan Metal Coatings | Port Huron | MI | — | ◇ UNVERIFIED |
| MMMichigan Metal Coatings Plant 2 | Port Huron | MI | — | ◇ UNVERIFIED |
| MSMicrometrics System | Meadows of Dan | VA | — | ◇ UNVERIFIED |
| MRMidwestern Rust Proof INC | Chicago | IL | — | ◇ UNVERIFIED |
| MMMidwest Metal Coatings LLC | Granite City | IL | — | ◇ UNVERIFIED |
| MGMillennium Galvanizing LLC | Convent | LA | — | ◇ UNVERIFIED |
| MMMinster Machine CO | Minster | OH | — | ◇ UNVERIFIED |
| MWMotor Wheel Commercial Vehicle Systems INC | Chattanooga | TN | — | ◇ UNVERIFIED |
| MWMotor Wheel LLC | Franklin | KY | — | ◇ UNVERIFIED |
| MWMsc Walbridge Coatings INC (0387000046) | Walbridge | OH | — | ◇ UNVERIFIED |
| MCMueller CO | Decatur | IL | — | ◇ UNVERIFIED |
| MCMueller CO | Decatur | IL | — | ◇ UNVERIFIED |
| MCMuncie Casting CORP | Muncie | IN | — | ◇ UNVERIFIED |
| MGMw Galvanizing INC | Chicago | IL | — | ◇ UNVERIFIED |
| NGN.a. Galvanizing CO - 4400 E 61st Ave | Commerce City | CO | — | ◇ UNVERIFIED |
| NGNational Galvanizing Hs Processing LP | Monroe | MI | — | ◇ UNVERIFIED |
| NONational Oilwell Varco/tulsa Multiplex | Tulsa | OK | — | ◇ UNVERIFIED |
| NINd Industries (1677130116) | Twinsburg | OH | — | ◇ UNVERIFIED |
| NINibco INC | Blytheville | AR | — | ◇ UNVERIFIED |
| NGNorgren Gt Development CORP | Auburn | WA | — | ◇ UNVERIFIED |
 Norman Noble INC Micromachining Div 1 | Highland Heights | OH | — | ◇ UNVERIFIED |
| NANorth American Galvanizing | Louisville | KY | — | ◇ UNVERIFIED |
| NANorth American Galvanizing Company | Saint Louis | MO | — | ◇ UNVERIFIED |
| NENorthern Engraving CORP | Spring Grove | MN | — | ◇ UNVERIFIED |
| NFNorthern Foundry | Hibbing | MN | — | ◇ UNVERIFIED |
| NINorthern Iron & Machine | Saint Paul | MN | — | ◇ UNVERIFIED |
| NFNylok Fastener CORP | Lincolnwood | IL | — | ◇ UNVERIFIED |
| OCOld Country Millwork INC | Los Angeles | CA | — | ◇ UNVERIFIED |
| OCOnesource Coil Coaters | Clearwater | FL | — | ◇ UNVERIFIED |
| OIOsco Industries, INC. New Boston Divisi (0773010180) | New Boston | OH | — | ◇ UNVERIFIED |
| OIOsco Industries INC Portsmouth Div | Portsmouth | OH | — | ◇ UNVERIFIED |
| OCOshkosh Corporation - Defense Plant | Oshkosh | WI | — | ◇ UNVERIFIED |
| OKO.s. Kelly Company (0812100276) | Springfield | OH | — | ◇ UNVERIFIED |
| PAPaladin Attachments (1677011077) | Akron | OH | — | ◇ UNVERIFIED |
| PTPas Technologies INC Dba Standardaero | N Kc | MO | — | ◇ UNVERIFIED |
| PFPentair Flow Technologies, LLC - Ashland Pump Plant (0303010175) | Ashland | OH | — | ◇ UNVERIFIED |
| PRPhiladelphia Rust-proof CO INC | Philadelphia | PA | — | ◇ UNVERIFIED |
| PFPier Foundry | Saint Paul | MN | — | ◇ UNVERIFIED |
| PMPioneer Metal Finishing - Stephens Road | Warren | MI | — | ◇ UNVERIFIED |
| PSPraxair Surface Technologies-spray Plant | New Castle | PA | — | ◇ UNVERIFIED |
| PMPrecision Metalsmiths INC. | Markesan | WI | — | ◇ UNVERIFIED |
| PMPrecoat Metals | Hawesville | KY | — | ◇ UNVERIFIED |
| PMPrecoat Metals | Portage | IN | — | ◇ UNVERIFIED |
| PMPrecoat Metals | La Porte | IN | — | ◇ UNVERIFIED |
| PMPrecoat Metals | Hueytown | AL | — | ◇ UNVERIFIED |
| PMPrecoat Metals | Saint Louis | MO | — | ◇ UNVERIFIED |
| PMPrecoat Metals | Houston | TX | — | ◇ UNVERIFIED |
| PMPrecoat Metals | Granite City | IL | — | ◇ UNVERIFIED |
| PMPrecoat Metals a Division of Sequa CORP | Greenfield | IN | — | ◇ UNVERIFIED |
| PMPrecoat Metals Division of Sequa Corporation | Elkridge | MD | — | ◇ UNVERIFIED |
 Professional Plating | Brillion | WI | — | ◇ UNVERIFIED |
| PFProspect Foundry LLC | Minneapolis | MN | — | ◇ UNVERIFIED |
| PCProtective Coatings INC | Kent | WA | — | ◇ UNVERIFIED |
| QCQuaker City Castings (0215090009) | Salem | OH | — | ◇ UNVERIFIED |
| QCQuality Castings CO | Waukesha | WI | — | ◇ UNVERIFIED |
| QCQuantum Clean | Hillsboro | OR | — | ◇ UNVERIFIED |
| QCQuantum Clean | Fremont | CA | — | ◇ UNVERIFIED |
| QQuantumclean | Scarborough | ME | — | ◇ UNVERIFIED |
| QGQuantum Global Technology | Phoenix | AZ | — | ◇ UNVERIFIED |
| RAR. A. Heller Company | Woodlawn | OH | — | ◇ UNVERIFIED |
| RSReeves Southeastern Galvanizing CORP. | Tampa | FL | — | ◇ UNVERIFIED |
| RHR H Sheppard CO INC | Hanover | PA | — | ◇ UNVERIFIED |
 Rie Coatings LLC | Eden Valley | MN | — | ◇ UNVERIFIED |
| RIRomac Industries | Sultan | WA | — | ◇ UNVERIFIED |
| SDSan Diego Galvanizing INC | San Diego | CA | — | ◇ UNVERIFIED |
| SCSequa Corporation, Dba Precoat Metals | Jackson | MS | — | ◇ UNVERIFIED |
| SGShannon Galvanizing | Floresville | TX | — | ◇ UNVERIFIED |
 Sioux City Foundry CO | South Sioux City | NE | — | ◇ UNVERIFIED |
| SGSiouxland Galvanizing | Sioux City | IA | — | ◇ UNVERIFIED |
| SISkills INC | Auburn | WA | — | ◇ UNVERIFIED |
| SISnap-on Incorporated | Milwaukee | WI | — | ◇ UNVERIFIED |
| SASouth Atlantic Galvanizing | Shannon | MS | — | ◇ UNVERIFIED |
| SASouth Atlantic Galvanizing | Travelers Rest | SC | — | ◇ UNVERIFIED |
| SASouth Atlantic Galvanizing | Mulberry | FL | — | ◇ UNVERIFIED |
| SASouth Atlantic Galvanizing | Graham | NC | — | ◇ UNVERIFIED |
| SASouth Atlantic Galvanizing | Chattanooga | TN | — | ◇ UNVERIFIED |
| SASouth Atlantic LLC Dba South Atlantic Ga | Laurens | SC | — | ◇ UNVERIFIED |
| SASouthern Atlantic Galvanizing | Claxton | GA | — | ◇ UNVERIFIED |
| SSSrt Sales and Service (1576001860) | Canton | OH | — | ◇ UNVERIFIED |
| SAStandard Alloys Port Arthur | Port Arthur | TX | — | ◇ UNVERIFIED |
| SUStarpipe USA Dba Sp Foundry / Sp Foundry | South Coffeyville | OK | — | ◇ UNVERIFIED |
| SPStauffer Pipe Services | Houston | TX | — | ◇ UNVERIFIED |
| SDSteel Dynamics INC | Jeffersonville | IN | — | ◇ UNVERIFIED |
| SMSteel Management Services | Nazareth | PA | — | ◇ UNVERIFIED |
| SMSt. Marys Foundry INC. (0306010004) | Saint Marys | OH | — | ◇ UNVERIFIED |
| TITech-etch, INC | Litchfield | MN | — | ◇ UNVERIFIED |
| TLTecnocap, LLC (0278080620) | Warren | OH | — | ◇ UNVERIFIED |
| TCTextron Cwc Division | Muskegon | MI | — | ◇ UNVERIFIED |
| TCThe C.a. Lawton CO. | Minster | OH | — | ◇ UNVERIFIED |
| TSThe Southern Galvanizing Company | Baltimore | MD | — | ◇ UNVERIFIED |
| TTThe Techs - Nextech Plant | Turtle Creek | PA | — | ◇ UNVERIFIED |
| TTiodize | Huntington Beach | CA | — | ◇ UNVERIFIED |
| TFTonkawa Foundry INC / Tonkawa Foundry | Tonkawa | OK | — | ◇ UNVERIFIED |
