| BTBellville Tube | Bellville | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BDBohn & Dawson | Kirkwood | MO | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BFBrendle Fire Equipment, INC. | Montgomery | AL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BEBromley Excavating | Centralia | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BMBull Moose Tube | Sinton | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BMBull Moose Tube CO | Chicago Heights | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| CSCentral Steel & Wire CO | Chicago | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| CPCentric Pipe LLC | Bossier City | LA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| CCCham Cal Engineering | Garden Grove | CA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| CIChrist Iron Works, INC. | Kenosha | WI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| CCContech Const Prod - Greencastle | Greencastle | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
 Contech Engineered Solutions, LLC | Englewood | TN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| CACooper-standard Automotive | Surgoinsville | TN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| CSCopperweld - Stainless Div | Elizabethtown | KY | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| CICrucible INC Trent Tube Div Plt 1 | East Troy | WI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| DBDamascus Bishop Tube/greenville | Greenville | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| DPDavis Pipe INC. | Blountville | TN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| ETEgle-rrd-austin Tube Prod | Baldwin | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| ETEpix Tube Company, INC. | Aurora | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| FTFayette Tubular Products | Sullivan | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| GWGamesa Wind/fairless Hills Wind Turbine Nacelle Mfg | Fairless Hills | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| GGerdau | Urbana | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| GTGibson Tube | Bridgewater | NJ | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| GCGordon Corporation | Southington | CT | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| GLGreat Lakes X-cel | Niles | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| HSHanna Steel CORP | Gadsden | AL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| HIHensley Industries INC - Mansfield Foundry Division | Mansfield | LA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| HPHickman Pipe and Tube Corporation | Hickman | KY | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| HTHydro Tube Enterprises, INC. (0247100874) | Oberlin | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| ITIpsco Tubulars INC. | Geneva | NE | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| ITIpsco Tubulars Incorporated | Camanche | IA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| JMJohn Maneely CO Wheatland Tube Div - Mill Street | Sharon | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| KEKirk Eastern | Gardner | MA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| KIK&k Iron Works | Mccook | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| KKnickerbocker | Carlstadt | NJ | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| LSLaclede Steel | Vandalia | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| LJLock Joint Tube - Tennessee | Chattanooga | TN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| LSLtv Steel Company Counce Plant | Counce | TN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MFMaeco Fabrication INC | Grand Bay | AL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MUMarcegaglia USA | Greenville | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MTMaverick Tube Corporation | Ferndale | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MGMccoy Global USA | Broussard | LA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MTMercury Tube - 3211 W Bear Creek Dr | Englewood | CO | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
 Metal Culverts INC Florida Div | Clearwater | FL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| NMNational Metalwares L.p. | Aurora | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| NTNucor Tubular Products | Bedford Park | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| OIOakley Industries INC | Niles | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| OUOdermath USA INC | Naperville | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| PTPacific Tube CO | Los Angeles | CA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| PIParagon Industries INC / Paragon Industries INC | Sapulpa | OK | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
