 Apache Stainless Equipment CORP | Plover | WI | — | ◇ UNVERIFIED |
| AMArcelor Mittal Marion | Marion | OH | — | ◇ UNVERIFIED |
| ACArntzen CORP | Woodstock | IL | — | ◇ UNVERIFIED |
| ACArntzen CORP | Rockford | IL | — | ◇ UNVERIFIED |
| AIAzco INC | Neenah | WI | — | ◇ UNVERIFIED |
| BMBerry Metal CO | Zelienople | PA | — | ◇ UNVERIFIED |
| BMBull Moose Tube | Sinton | TX | — | ◇ UNVERIFIED |
| BMBull Moose Tube CO. INC. - Plant #9 | Elkhart | IN | — | ◇ UNVERIFIED |
| BMBull Moose Tube CO - Masury Plant | Masury | OH | — | ◇ UNVERIFIED |
| CICerda Industries, INC. | Houston | TX | — | ◇ UNVERIFIED |
| CTCleveland-cliffs Tubular Components | Walbridge | OH | — | ◇ UNVERIFIED |
| CSCorey Steel CO | Cicero | IL | — | ◇ UNVERIFIED |
| DTDakota Tube Building 3 | Watertown | SD | — | ◇ UNVERIFIED |
| DIDelong's Incorporated | Sedalia | MO | — | ◇ UNVERIFIED |
| DPDura-bond Pipe 1 LLC | Mckeesport | PA | — | ◇ UNVERIFIED |
| FDFlowline Div Ezeflow Usa/new Castle | New Castle | PA | — | ◇ UNVERIFIED |
| GTGlobal Tubing LLC Coiled Tubing Manufacturing Facility in Dayton Texas | Dayton | TX | — | ◇ UNVERIFIED |
| HSHanna Steel CORP | Northport | AL | — | ◇ UNVERIFIED |
| HSHanna Steel CORP | Pekin | IL | — | ◇ UNVERIFIED |
| HIHofmann Ind Inc/sinking Spring | Sinking Spring | PA | — | ◇ UNVERIFIED |
| ITIndependence Tube Corporation - Trinity | Trinity | AL | — | ◇ UNVERIFIED |
| IKIpsco Koppel Tubular CORP Ambridge | Ambridge | PA | — | ◇ UNVERIFIED |
| ITIpsco Tubulars INC | Blytheville | AR | — | ◇ UNVERIFIED |
| JCJeffrey Chain Corporation | Morristown | TN | — | ◇ UNVERIFIED |
| JZJohn Zink Apache Facility | Tulsa | OK | — | ◇ UNVERIFIED |
| KCKawneer Company, INC | Hernando | MS | — | ◇ UNVERIFIED |
| KTK Tube Corporation | Poway | CA | — | ◇ UNVERIFIED |
| MUMarcegaglia USA Munhall Plant | Munhall | PA | — | ◇ UNVERIFIED |
| MTMaverick Tube LP Blythev L | Blytheville | AR | — | ◇ UNVERIFIED |
| MIMetal-matic INC | Bedford Park | IL | — | ◇ UNVERIFIED |
| MMMid-west Manufacturing CO | Chicago Heights | IL | — | ◇ UNVERIFIED |
| MMMisa Metal Fabricating INC | Louisville | KY | — | ◇ UNVERIFIED |
| NSNippon Sharyo Manufacturing LLC | Rochelle | IL | — | ◇ UNVERIFIED |
| NPNorthwest Pipe CO | Washington | WV | — | ◇ UNVERIFIED |
| NPNorthwest Pipe Company | Portland | OR | — | ◇ UNVERIFIED |
| NPNorthwest Pipe Longhorn | Saginaw | TX | — | ◇ UNVERIFIED |
| NANov Ameron Tulsa Pole Products Tube Manufacturing | Tulsa | OK | — | ◇ UNVERIFIED |
| NANov Ameron Tulsa Pole Products Welding & Fabrication | Tulsa | OK | — | ◇ UNVERIFIED |
| NTNucor Tublar Products INC. | Birmingham | AL | — | ◇ UNVERIFIED |
| NTNucor Tubular Products INC | Marseilles | IL | — | ◇ UNVERIFIED |
| OSOutokumpu Stainless Pipe INC. | Wildwood | FL | — | ◇ UNVERIFIED |
| PIParagon Industries, INC | Sapulpa | OK | — | ◇ UNVERIFIED |
| PSPenn State Special Metals LLC | Koppel | PA | — | ◇ UNVERIFIED |
| PJPhillips & Johnston INC Dba River Rock Fabrication | Grand Rapids | MI | — | ◇ UNVERIFIED |
| PIPicoma Industries-a Division of Zekelman Industries | Cambridge | OH | — | ◇ UNVERIFIED |
| PSPlm Steel Tubes | Laredo | TX | — | ◇ UNVERIFIED |
| PEPlymouth Engineered Shapes | Hopkinsville | KY | — | ◇ UNVERIFIED |
| PTPlymouth Tube CO | West Monroe | LA | — | ◇ UNVERIFIED |
| PTPlymouth Tube Company | Winamac | IN | — | ◇ UNVERIFIED |
| PTPlymouth Tube Company | Eupora | MS | — | ◇ UNVERIFIED |
