| KMKalas Manufacturing INC Lancaster Plant | Lancaster | PA | Primary Metal Manufacturing331420 | 100-499 | ◐ LIKELY ACTIVE |
| KPKlein Plating Works | Erie | PA | Fabricated Metal Product Manufacturing332813 | 20-99 | ▲ REPORTED CLOSED |
| LTLeading Technologies INC | Leechburg | PA | Fabricated Metal Product Manufacturing332812 | — | ◐ LIKELY ACTIVE |
| LCLeech Carbide | Meadville | PA | Fabricated Metal Product Manufacturing332117 | 20-99 | ◐ LIKELY ACTIVE |
| LFL&m Fabrication & Machine Inc/ East Allen | Bath | PA | Fabricated Metal Product Manufacturing332312 | — | ◐ LIKELY ACTIVE |
| MTMack Trucks Inc/remanufacturing Ctr | Middletown | PA | Fabricated Metal Product Manufacturing332439 | — | ◐ LIKELY ACTIVE |
| MSMain Steel Inc/harmony | Harmony | PA | Fabricated Metal Product Manufacturing332117 | — | ◐ LIKELY ACTIVE |
Metal Powder Works, LLC | Clinton | PA | Fabricated Metal Product Manufacturing332117 | — | ◐ LIKELY ACTIVE |
| MMetaltech/pgh | Pittsburgh | PA | Fabricated Metal Product Manufacturing332812 | — | ◐ LIKELY ACTIVE |
| NANcc Automated Systems, INC. | Souderton | PA | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| NTNetshape Technologies - Falls Creek Facility | Falls Creek | PA | Fabricated Metal Product Manufacturing332117 | — | ◐ LIKELY ACTIVE |
| NNobelclad | Mount Braddock | PA | Fabricated Metal Product Manufacturing332313 | 20-99 | ◐ LIKELY ACTIVE |
| NPNorma Pennsylvania | Clarksburg | PA | Fabricated Metal Product Manufacturing332510 | 100-499 | ◐ LIKELY ACTIVE |
| PIPanagraphics INC | Dover | PA | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| PIPenn-elkco INC | Saint Marys | PA | Fabricated Metal Product Manufacturing332613 | — | ◐ LIKELY ACTIVE |
| PFPhoenix Forging | Catasauqua | PA | Fabricated Metal Product Manufacturing332111 | 20-99 | ◐ LIKELY ACTIVE |
| PSPraxair Surface Technologies-spray Plant | New Castle | PA | Fabricated Metal Product Manufacturing332812 | — | ◐ LIKELY ACTIVE |
| PAPrecision Assembly, INC | Willow Grove | PA | Chemical Manufacturing325320 | 1-19 | ◐ LIKELY ACTIVE |
| PPPremier Pan CO INC | Crescent | PA | Fabricated Metal Product Manufacturing332119 | 100-499 | ◐ LIKELY ACTIVE |
| RIRegal Industrial Corporation | Donora | PA | Fabricated Metal Product Manufacturing332312 | 100-499 | ◐ LIKELY ACTIVE |
| RPReilly Plating CO INC | Nanticoke | PA | Fabricated Metal Product Manufacturing332813 | — | ◐ LIKELY ACTIVE |
| RSReynolds Services INC | Greenville | PA | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
| SISintergy, Inc, | Reynoldsville | PA | Fabricated Metal Product Manufacturing332117 | 20-99 | ◐ LIKELY ACTIVE |
| SCSippel CO INC Dba Sippel Steel Fab | Ambridge | PA | Fabricated Metal Product Manufacturing332312 | 100-499 | ◐ LIKELY ACTIVE |
| SPSmc Powder Metallurgy | Galeton | PA | Fabricated Metal Product Manufacturing332117 | — | ◐ LIKELY ACTIVE |
| STSnap Tite INC Union City Site | Union City | PA | Fabricated Metal Product Manufacturing332721 | — | ◐ LIKELY ACTIVE |
| SFStandard Forged Products | Mc Kees Rocks | PA | Fabricated Metal Product Manufacturing332111 | 20-99 | ◐ LIKELY ACTIVE |
| SHStandard Horse Nail Corporation | New Brighton | PA | Fabricated Metal Product Manufacturing332510 | 20-99 | ◐ LIKELY ACTIVE |
| SIStandard Iron Works | Scranton | PA | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| SBStanley Black and Decker Inc/allentown | Allentown | PA | Fabricated Metal Product Manufacturing332999 | — | ◐ LIKELY ACTIVE |
| SISwf Industrial | Wrightsville | PA | Fabricated Metal Product Manufacturing332312 | 100-499 | ◐ LIKELY ACTIVE |
| TTThermal Transfer CORP | Duquesne | PA | Fabricated Metal Product Manufacturing332410 | — | ◐ LIKELY ACTIVE |
| TEThomas Erie INC | Girard | PA | Fabricated Metal Product Manufacturing332119 | 20-99 | ◐ LIKELY ACTIVE |
| TMTonnard Manufacturing CORP | Corry | PA | Fabricated Metal Product Manufacturing332116 | 20-99 | ◐ LIKELY ACTIVE |
| TKTri Kris CO INC | Lansdale | PA | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| UAUS Army Scranton Army Ammunition Plant | Scranton | PA | Fabricated Metal Product Manufacturing332111 | — | ◐ LIKELY ACTIVE |
| UBUS Boiler INC | Lancaster | PA | Fabricated Metal Product Manufacturing332410 | 100-499 | ◐ LIKELY ACTIVE |
| VTViking Tool & Gage | Conneaut Lake | PA | Fabricated Metal Product Manufacturing332119 | 100-499 | ◐ LIKELY ACTIVE |
| VCVorteq Coil Finishers/valencia Plt | Valencia | PA | Fabricated Metal Product Manufacturing332114 | — | ◐ LIKELY ACTIVE |
| VLV&s Lebanon Galvanizing LLC | Jonestown | PA | Textile Product Mills314121 | 20-99 | ◐ LIKELY ACTIVE |
| WSWheatland Steel Processing | Hermitage | PA | Fabricated Metal Product Manufacturing332111 | 20-99 | ◐ LIKELY ACTIVE |
| WIWoodward, Incorporated | Mars | PA | Fabricated Metal Product Manufacturing332114 | 20-99 | ◐ LIKELY ACTIVE |
| YGYoung Galvanizing | Pulaski | PA | Fabricated Metal Product Manufacturing332812 | — | ◐ LIKELY ACTIVE |
| ZMZippo Mfg Co/congress St | Bradford | PA | Fabricated Metal Product Manufacturing332813 | — | ◐ LIKELY ACTIVE |
Amuneal Manufacturing CORP | Philadelphia | PA | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| ATApex Tool Group Campbell Operations | York | PA | Fabricated Metal Product Manufacturing332212 | — | ◐ LIKELY ACTIVE |
| AAAssa Abloy Svc Ctr/forks Twp | Easton | PA | Fabricated Metal Product Manufacturing332321 | — | ◐ LIKELY ACTIVE |
| CMCampbell Manufacturing LLC | Bechtelsville | PA | Fabricated Metal Product Manufacturing332919 | — | ◐ LIKELY ACTIVE |
| DMDf Mfg Inc/hydro Carbide Tool CO | Latrobe | PA | Fabricated Metal Product Manufacturing332117 | — | ◐ LIKELY ACTIVE |
| EMEriez Mfg Co/erie | Erie | PA | Fabricated Metal Product Manufacturing332999 | — | ◐ LIKELY ACTIVE |