| TBTenaris Bay City | Bay City | TX | Primary Metal Manufacturing331210 | 500+ | ◐ LIKELY ACTIVE |
| TTThe Troxel Company | Moscow | TN | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| TMTru-line Manufacturing Company | Decatur | AL | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| VTVallourec Tube Alloy | Houston | TX | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| WIWebco Industries, Star Center Tube | Sand Springs | OK | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| WFWyman-gordon Forgings INC | Houston | TX | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| AAccellent | Salem | VA | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| ATAk Tube LLC | Columbus | IN | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| ATAllied Tube and Conduit | Merrillville | IN | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| ATAllied Tube & Conduit Corporation | Liberty | TX | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| ACArntzen CORP | Rockford | IL | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| ACArntzen CORP | Woodstock | IL | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| AIAzco INC | Neenah | WI | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| BMBerry Metal CO | Zelienople | PA | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| CDControl Devices | Fenton | MO | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| CSCorey Steel CO | Cicero | IL | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| DTDakota Tube Building 3 | Watertown | SD | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| DPDura-bond Pipe 1 LLC | Mckeesport | PA | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| HSHanna Steel CORP | Pekin | IL | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| HSHanna Steel CORP | Northport | AL | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| HIHofmann Ind Inc/sinking Spring | Sinking Spring | PA | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| JCJeffrey Chain Corporation | Morristown | TN | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| JZJohn Zink Apache Facility | Tulsa | OK | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| KCKawneer Company, INC | Hernando | MS | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| KTK Tube Corporation | Poway | CA | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| MMMid-west Manufacturing CO | Chicago Heights | IL | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| MMMisa Metal Fabricating INC | Louisville | KY | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| NPNorthwest Pipe CO | Washington | WV | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| NPNorthwest Pipe Company | Portland | OR | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| NTNucor Tublar Products INC. | Birmingham | AL | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| NTNucor Tubular Products INC | Marseilles | IL | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| OSOutokumpu Stainless Pipe INC. | Wildwood | FL | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| PTPlymouth Tube CO | West Monroe | LA | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| RIRathgibson INC | North Branch | NJ | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| RJRathgibson Janesville LLC | Janesville | WI | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| SMSalzgitter Mannesmann Stainless Tubes | Houston | TX | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| SMSandvik Materials Technology | Clarks Summit | PA | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| SIScot Industries | Muscoda | WI | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
Skyline Steel | Camp Hill | PA | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| SSSkyline Steel | Newton | IL | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
Skyline Steel LLC | Longview | WA | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| SWSteel Warehouse CO LLC | South Bend | IN | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| TCTenarius Coiled Tube | Houston | TX | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| THTexas Honing INC - Pearland | Pearland | TX | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| USUnited Stainless INC | Selmer | TN | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| VSVallourec Star LP / Muskogee Plt | Muskogee | OK | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| VNValmont Newmark | Tulsa | OK | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| VQVarco Quality Tubing Tuboscope Div | Houston | TX | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| WWardflex | Tioga | PA | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| WIWebco Industries | Lyndon | IL | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |