| WWardflex | Tioga | PA | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| WMWard Mfg Plt 1 & 2 | Blossburg | PA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
Webco Industries, INC. - Reno Division | Reno | PA | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| WEWestinghouse Elec CO - Specialty Metals Plant | Blairsville | PA | Primary Metal Manufacturing331491 | — | ◐ LIKELY ACTIVE |
| WTWheatland Tube Church St Plt | Wheatland | PA | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| WTWolf Tech Llc/douglassville | Douglassville | PA | Primary Metal Manufacturing331512 | — | ◐ LIKELY ACTIVE |
| MUMarcegaglia USA Munhall Plant | Munhall | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| ALAlumicore LLC | Monessen | PA | Primary Metal Manufacturing331314 | 20-99 | ◐ LIKELY ACTIVE |
| AFAti Flat Rolled Products, LLC | Natrona Heights | PA | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| BRBronze Resources | Aliquippa | PA | Primary Metal Manufacturing331522 | 1-19 | ◐ LIKELY ACTIVE |
| CICarson Industries, Inc. | Freeport | PA | Primary Metal Manufacturing331524 | 20-99 | ◐ LIKELY ACTIVE |
| CCChemalloy Company LLC | Conshohocken | PA | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| FFFairmount Foundry Inc. | Hamburg | PA | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
Omega Flex, INC. | Exton | PA | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| OOPTA-Affival | New Kensington | PA | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| SCSpring City Electrical Mfg. Co. | Spring City | PA | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| UCUnicast Company | Boyertown | PA | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| WCWhemco-steel Castings, INC | Pittsburgh | PA | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| ACArrow Castings Company | Erie | PA | Primary Metal Manufacturing331313 | 1-19 | ◐ LIKELY ACTIVE |
| BMBardane Manufacturing | Jermyn | PA | Primary Metal Manufacturing331521 | 20-99 | ◐ LIKELY ACTIVE |
| CRCast Rite Metal Company, INC. | Birdsboro | PA | Primary Metal Manufacturing331524 | 20-99 | ◐ LIKELY ACTIVE |
| DIDickson Investment Hardware INC | King of Prussia | PA | Primary Metal Manufacturing331512 | 1-19 | ◐ LIKELY ACTIVE |
| JFJohnstown Foundry Castings, INC. | Johnstown | PA | Primary Metal Manufacturing331513 | 1-19 | ◐ LIKELY ACTIVE |
| KIK-castings INC | Latrobe | PA | Primary Metal Manufacturing331525 | 1-19 | ◐ LIKELY ACTIVE |
| PSPrecison Steel Services, INC. | Farrell | PA | Primary Metal Manufacturing331210 | 1-19 | ◐ LIKELY ACTIVE |
| TATemple Aluminum Foundry, Incorporated | Blandon | PA | Primary Metal Manufacturing331524 | 20-99 | ◐ LIKELY ACTIVE |
| TTTin Technology & Refining | West Chester | PA | Primary Metal Manufacturing331492 | 1-19 | ◐ LIKELY ACTIVE |
| 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 |
| ASAk Steel Corp/butler Works | Butler | PA | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| AVAlumicore Ventures Llc/monessen | Monessen | PA | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
| BCBekaert Corp/hanover Twp | Wilkes Barre | PA | Primary Metal Manufacturing331222 | — | ◐ LIKELY ACTIVE |
| BRBlue Ridge Pressure Casting, INC. | Lehighton | PA | Primary Metal Manufacturing331521 | 100-499 | ◐ LIKELY ACTIVE |
| BFBoyertown Foundry Company | New Berlinville | PA | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| CCChemalloy Company Llc/ Conshohocken | Bryn Mawr | PA | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| CMCk Manufacturing, LLC | Lancaster | PA | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| CSCleveland-Cliffs Steelton LLC | Steelton | PA | Primary Metal Manufacturing331110 | 500+ | ◐ LIKELY ACTIVE |
| CMConcast Metal Prod Co/adams Twp | Mars | PA | Primary Metal Manufacturing331525 | — | ◐ LIKELY ACTIVE |
| CMConemaugh Mem Med Ctr/johnstown | Johnstown | PA | Primary Metal Manufacturing331318 | — | ◐ LIKELY ACTIVE |
| DADavis Alloys Mfg Llc/sharpsville | Sharpsville | PA | Primary Metal Manufacturing331512 | — | ◐ LIKELY ACTIVE |
| DIDonsco Inc Mount Joy Foundry | Mount Joy | PA | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| EPEast Penn Mfg CO Inc/smelter Plt | Lyons | PA | Primary Metal Manufacturing331492 | — | ◐ LIKELY ACTIVE |
| EEEsmark Excalibur LLC - Conneaut Lake | Conneaut Lake | PA | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| FFFlury Foundry CO | Lancaster | PA | Primary Metal Manufacturing331529 | — | ◐ LIKELY ACTIVE |
| GFGeorgia Financial Xiii Llc/avonmore Plt | Avonmore | PA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| GDGerard Daniel Worldwide/hanover Keystone Facility | Hanover | PA | Primary Metal Manufacturing331222 | — | ◐ LIKELY ACTIVE |