| TCTalladega Castings & Machine CO INC | Talladega | AL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| TOTexas Outdoor Cookers, LLC | Willow City | TX | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| TPThreaded Products CO | Richmond | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| TBThunder Bay Foundry | Alpena | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| TFTomahawk Foundary, INC | Rice Lake | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
 Travis Pattern Foundry | Spokane Valley | WA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| TITree Island Steel Dba Tree Island Wire USA INC | San Bernardino | CA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| TFTroy Foundry (screening Plant) | Adger | AL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| USUnited States Pipe & Foundry Company LLC | Naperville | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| UDU.s. Department of Labor-osha | Red Bud | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| UDUS Dol Osha Fort Lauderdale Ao | Medley | FL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| USU S Foundry & Manufacturing | Tampa | FL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| UCUsg Ceilings Plus LLC | Commerce | CA | Nonmetallic Mineral Product Manufacturing327122 | — | ◇ UNVERIFIED |
| VVValley / Vulcan Mold CO | Trenton | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| WMWard Manufacturing, LLC | Blossburg | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| WFWaterman Foundry | Exeter | CA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| WAWaunakee Alloy Casting Corporation | Waunakee | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
 Waupaca Foundry Landfill | Waupaca | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| WWelaco | Bakersfield | CA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| WCWesgo Ceramics | Belmont | CA | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| WCWest Coast Cnc, INC | Huntington Beach | CA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| WCWestern Castings Company | Santa Clara | CA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| WMWestern Metals Recycling, LLC | Pueblo | CO | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| WGWgs Global Services L C | Etowah | TN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| WIWh Industries Delaware, INC. | Jacksonville | AL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| WFWollaston Foundry | Quincy | MA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
