| GRGreenway Recycling Services | Pasadena | TX | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| GSG & S Foundry & Mfg | Red Bud | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| GSG & S Titanium INC | Wooster | OH | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| GWGulf Wire CORP | New Orleans | LA | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| GFG&w Foundry | Rehoboth | MA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| HEHalethorpe Extrusions Incorporated | Baltimore | MD | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| HPHalpern Processing INC. | Philadelphia | PA | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| HBHamilton Brass & Aluminum Castings CO | Hamilton | OH | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| HFHamilton Foundry & Machine Co, Decatur Casting Div | Decatur | IN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| HCHamlin Casting CORP. | Pilot Mountain | NC | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| HHHampton Hydraulics Llc-div of Seabee | Hampton | IA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| HSHanna Steel CORP | Gadsden | AL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| HLHanover Lantern Inc/kindig Ln | Hanover | PA | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| HMHarris Mfg & Supply | Orange | MA | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| HRHarris Rebar Nufab LLC - Ambassador Steel CORP | Slidell | LA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| HMHarry Masser CO INC | Columbus | OH | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| HMHavana Metal Culverts INC | Havana | IL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| HCHayes-albion Corporation | Albion | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| HLHayes Lemmerz Interna | Gainesville | GA | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| HLHayes - Lemmerz International | La Mirada | CA | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| HCHazleton Casting CO | Hazleton | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| HCHazleton Casting CO Llc/hazleton | Hazleton | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| HCHba Cast Products Company | Springfield | MA | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| HIHd Industries | Detroit | MI | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| HBHealy Brothers CORP | Lincoln | RI | Primary Metal Manufacturing331528 | — | ◇ UNVERIFIED |
| HFHeartland Foundry CORP | Marengo | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| HFHebert Foundry & Machine | Laconia | NH | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| HSHemlock Semiconductor, L.l.c. | Clarksville | TN | Primary Metal Manufacturing331410 | — | ◇ UNVERIFIED |
| HIHennessy Industries INC Bada Div | Bowling Green | KY | Primary Metal Manufacturing331522 | — | ◇ UNVERIFIED |
| HPHenry Perkins CO the | Bridgewater | MA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| HIHensley Industries INC - Mansfield Foundry Division | Mansfield | LA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| HIHeraeus INC | Newark | NJ | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| HLHerculaneum - Lead Smelter Site | Herculaneum | MO | Primary Metal Manufacturing331410 | — | ◇ UNVERIFIED |
| HHH & H Inc., Burn Pit | Montpelier | VA | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| HPHickman Pipe and Tube Corporation | Hickman | KY | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| HPHigh Performance Products INC @ Medway Ind Pk | Branchburg Twp | NJ | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| HPHigh Performance Tube | Brunswick | GA | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| HAHi-grade Alloy CORP | Hazel Crest | IL | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| HMHitchiner Mfg CO INC | Littleton | NH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| HPHi-tech Plating | Erie | PA | Primary Metal Manufacturing331112 | — | ◇ UNVERIFIED |
| HMHofley Mfg CO | Roseville | MI | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| HCHogan CO INC | Bloomington | CA | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| HGHolmes Group Incorporated Rival Manufacturing Division | Sedalia | MO | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| HZHorsehead Zinc Powders LLC | Monaca | PA | Primary Metal Manufacturing331410 | — | ◇ UNVERIFIED |
| HMHoskin & Muir, INC. Dba Cardinal Commerical Products | Louisville | KY | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| HMHoskins Manufacturing | New Paris | IN | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| HOHouse of Stainless Dba Scott Brass INC. | Cranston | RI | Primary Metal Manufacturing331419 | — | ◇ UNVERIFIED |
| HCHowmet Castings and Services Incorporated | Hampton | VA | Primary Metal Manufacturing331528 | — | ◇ UNVERIFIED |
| HCHowmet Corporation, Hrc and Plants 5 & 10 | Whitehall | MI | Primary Metal Manufacturing331528 | — | ◇ UNVERIFIED |
| HIHowse Implement Company, Inc, Howse Implement Company Waste Tire Processing Faci | Laurel | MS | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
