| MUMarcegaglia USA Munhall Plant | Munhall | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| ACAlumina Ceramic Components INC | Latrobe | PA | Primary Metal Manufacturing331313 | 1-19 | ◇ UNVERIFIED |
| CPCharter Plastics | Titusville | PA | Primary Metal Manufacturing331524 | 20-99 | ◇ UNVERIFIED |
 Embassy Powdered Metals/emporium | Emporium | PA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| GFGettysburg Foundry Spec Mfg | Gettysburg | PA | Primary Metal Manufacturing331492 | 20-99 | ◇ UNVERIFIED |
| GIGottlieb INC | Neville Island | PA | Primary Metal Manufacturing331314 | 20-99 | ◇ UNVERIFIED |
| UBUnited Bronze of Pittsburgh | Tarentum | PA | Primary Metal Manufacturing331523 | 1-19 | ◇ UNVERIFIED |
| ARAg-met Refining CORP | Delano | PA | Primary Metal Manufacturing331528 | — | ◇ UNVERIFIED |
| APAir Products & Chemicals INC | Lancaster | PA | Primary Metal Manufacturing331315 | — | ◇ UNVERIFIED |
| ANAkers Natl Roll Co/hyde Park Foundry | Hyde Park | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| ASAk Steel Butler Works | Butler | PA | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| ALAllegheny Ludlum CORP | Houston | PA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| ALAllegheny Ludlum Cor/washington Flatroll | Washington | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| ALAllegheny Ludlum Llc/houston Fitch Works | Houston | PA | Primary Metal Manufacturing331100 | — | ◇ UNVERIFIED |
| AMAmeri-precision Metals Inc/canonsburg Fac | Canonsburg | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| BMBardane Mfg Co/jermyn Plt | Jermyn | PA | Primary Metal Manufacturing331523 | — | ◇ UNVERIFIED |
| BFBeaver Falls Tubular Prodllc/beaver Falls Plt | Beaver Falls | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BSBigbee Steel & Tank CO | Manheim | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| BFBoyertown Foundry Co/fka Eafco | New Berlinville | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BBBrass & Bronze Casting CO | Irwin | PA | Primary Metal Manufacturing331522 | — | ◇ UNVERIFIED |
| BABridon American CORP | Exeter | PA | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| BEBrighton Electric Steel Casting CO | Beaver Falls | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| BEBrubacher Excavating INC | Bowmansville | PA | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| BSBudd Site | Philadelphia | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| CICarson Ind/freeport | Freeport | PA | Primary Metal Manufacturing331523 | — | ◇ UNVERIFIED |
| CWCavert Wire | Lemont Furnace | PA | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| CMChevron Molycorp Washington Remediation Proj | Washington | PA | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| CMClearfield Mach Co/3rd & Everett Streets | Clearfield | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CFCol Fin Specialty Steel Mfg | New Brighton | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| CCContech Const Prod - Greencastle | Greencastle | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| DBDamascus Bishop Tube/greenville | Greenville | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| DDDemorah Drive Associates | Montgomeryville | PA | Primary Metal Manufacturing331423 | — | ◇ UNVERIFIED |
| DMDent Mfg CO Inc/northampton | Northampton | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| DCDomestic Casting CO LLC | Shippensburg | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| DIDynamet INC N Main St Fac | Washington | PA | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| EIEafco INC | Boyertown | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| EBEagle Brass Company | Leesport | PA | Primary Metal Manufacturing331421 | — | ◇ UNVERIFIED |
| EFEffort Foundry Inc/bath | Bath | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| ESEsab Site at Sandvik Smt | Clarks Summit | PA | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| ETExide Technologies - Reading Smelter Div | Reading | PA | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| ETExide Technologies Site | Laureldale | PA | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| FHFairless Hills Steam Generating Sta | Fairless Hills | PA | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| FSFranklin Smelting & Refining CORP | Philadelphia | PA | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| FAFreedom Alloys INC | Royersford | PA | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| GWGamesa Wind/fairless Hills Wind Turbine Nacelle Mfg | Fairless Hills | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| GSGkn Sinter Metals - Emporium Boro Plant 2 | Emporium | PA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| HLHanover Lantern Inc/kindig Ln | Hanover | PA | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| HCHazleton Casting CO | Hazleton | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| HCHazleton Casting CO Llc/hazleton | Hazleton | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| HPHi-tech Plating | Erie | PA | Primary Metal Manufacturing331112 | — | ◇ UNVERIFIED |
