| PSPtc Seamless Tube CORP | Hopkinsville | KY | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| RDRays Dies and Tubing | Swanton | VT | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| RSRiver Steel INC | La Crosse | WI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| RMRosedale Marketing Dba Port-a Stall | Erie | CO | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| RTRubicon Technology | Batavia | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| SIScot Industries, INC. | Talladega | AL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| SCShasta Capt Haz Waste Operation | Aliquippa | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| SSpacerak | Marlette | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| SPStainless Piping Specialists | Omro | WI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| SFSteel Fab | Anchorage | AK | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| SPSteel Pipe Fabricators, LLC | Norcross | GA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| S7Subsea 7 Ingleside | Ingleside | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| SISummit Iron Works | Indiana | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| SPSwagelok Processing Corporation/koppel Facility | Koppel | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| SSSxp Schulz Xtruded Products LLC | Hernando | MS | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| TCTag Contructors | Hammond | IN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| TCTenaris Coiled Tubes - Seacat | Houston | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| TITepco INC | South Lyon | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| TATi Automotive Systems | Auburn Hills | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| TFTi Fluid Systems | Tallassee | AL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| TGTi Group Automotive System, LLC | Cynthiana | KY | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| TWToro Wheel Horse Prods. INC. | South Bend | IN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| TTTrent Tube | Carrollton | GA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| TPTubular Processing Houston Operations | Houston | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| TPTubular Products Company, INC. | Birmingham | AL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| UEUnion Elec Steel Carnegie Plant | Carnegie | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| UIUnited Industries | Selmer | TN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| 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 |
| ASAccu-Tube - Sheridan | Englewood | CO | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| AIAce Irrigation and MFG. Co.- Eaton Metals | Kearney | NE | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| AOAgri of Virginia INC | Broadway | VA | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| AFAk Fab LLC | Redmond | OR | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| ALAlbert Lea | Albert Lea | MN | Food Manufacturing311999 | 1-19 | ◐ LIKELY ACTIVE |
| AUAlleima USA LLC - Houston | Houston | TX | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| ATAllied Tube & Conduit DePere Wisconsin | DePere | WI | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| ATAllied Tube & Conduit Hobart Indiana | Merrillville | IN | Primary Metal Manufacturing331210 | 100-499 | ◐ LIKELY ACTIVE |
| AMAmerican Metal Fabrication INC | Wellington | KS | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| ASAmerican SpiralWeld Great Lakes Division | Flint | MI | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| ASAmerican SpiralWeld Pipe Co., Southwest Division | Paris | TX | Primary Metal Manufacturing331210 | 100-499 | ◐ LIKELY ACTIVE |
| AAArc Above Welding LLC | Perry | OK | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| AWArc-up Welding, INC | Vicksburg | MS | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| APARI Phoenix Inc | Sharonville | OH | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| ATAtlas Tube-Birmingham Zekelman Industries | Birmingham | AL | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| BCBig Country Livestock Equipment, Inc. | Rising Star | TX | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
