| USUnited Stars INC | Beloit | WI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| UTUniversal Tube | Rochester Hills | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| UPU.s. Pipe Fabrication | Gainesville | GA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| VIVacuum Instrument CORP | Ronkonkoma | NY | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
 Webco Industries, INC. Keystone | Sand Springs | OK | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| WTWestern Tube & Conduit CORP | Long Beach | CA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| WTWheatland Tube Co/clark St Plt | Sharon | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| RIRodrill, INC. | Converse | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| TTThe Tube Fabrication Company, INC. | Fredonia | NY | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| 1E104404 - E and H Tubing | Brownstown | IN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| 1A128074 - American Stainless Tubing, INC. | Troutman | NC | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
 128568 - Lane Enterprises, INC. | Statesville | NC | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| 1U138776 - U.s. Industrial Piping, INC. | Kernersville | NC | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| 5M56307 - Maverick C-p INC Dba Republic Conduit | Pleasure Ridge Park | KY | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| 6S6800 Stapleton, LLC | Denver | CO | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| 7S72 Steel LLC | Aliquippa | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| 9M93099 - Metal-matic INC | Minneapolis | MN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| 9C94270 - Connaughty Industries INC | Rushford | MN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| 9B94610 - Behrens Manufacturing LLC | Winona | MN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| AAA-1 Accurate, LLC | Grand Rapids | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| APABRS Properties | Detroit | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| AWAce Welding Co., INC. | Merrimack | NH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| AUAdecco USA INC. | Panama City Beach | FL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| AGAden Guan Incorporated | South El Monte | CA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| ACAdvanced Centrifugals | Cambridge | WI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| AWAdvance Welding & Fabrication, LLC | Union | MO | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| AMAfco Manufacturing | Holly | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| ACAlaska Company INC | Stroudsburg | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| AFAlaska Frontier Fabrication LLC | Palmer | AK | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| ABAll Bending and Tubular Products LLC | Grand Rapids | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| AHAmerican Highway Products, LTD | Bolivar | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| ASAmerican Spiral Weld Pipe | Flint | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| ASAmerican Steel Fab | Pevely | MO | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| AUAngstrom USA LLC | Taylor | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| AUArmor Up, LLC | Tulsa | OK | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| ABAti Billerica Operations | Billerica | MA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| AIAuburn Industries A&A Inc | Auburn Hills | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| APAul Pipe Tube & Steel INC | Vernon | CA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| APAxis Pipe and Tube Bryan Facility | Bryan | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BPBarr Properties, LLC | Madison | IN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BMBenzie Manufacturing LLC | Frankfort | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BEBerry Enterprise of Ms, INC | Perkinston | MS | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BABest American Welding & Steel | Westbury | NY | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BDBlack Diamond Welding INC | Roosevelt | UT | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BFBlue Fabrication INC | Delta | CO | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BTBoomerang Tube LLC | Chesterfield | MO | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BSBostic Steel, INC. | Miami | FL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BFBranson Family Holdings LLC | Rapid City | SD | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BCBrittany Catania | San Bernardino | CA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BIBronson Investments, Inc. | White City | OR | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
