| TITrinity Inds INC Fitting Grp | Russellville | AR | — | ◇ UNVERIFIED |
| TITrinity Inds INC Plant 04 | Rocky Mount | NC | — | ◇ UNVERIFIED |
| TITrinity Inds INC Plant 22 | Fort Worth | TX | — | ◇ UNVERIFIED |
| TITrinity Industries | Elizabethtown | KY | — | ◇ UNVERIFIED |
| TITrinity Industries INC Plt 23 | Denton | TX | — | ◇ UNVERIFIED |
| TITrinity Iron Works | Weaverville | CA | — | ◇ UNVERIFIED |
| TRTrinity Railcar Plant 192 | Saginaw | TX | — | ◇ UNVERIFIED |
| TSTrinity Steel Corporation | Ventura | CA | — | ◇ UNVERIFIED |
| TSTrinity Steel Fabricators, INC. | Trinity | TX | — | ◇ UNVERIFIED |
| TTTrinity Tank Car INC Plt 194 | Longview | TX | — | ◇ UNVERIFIED |
| TTTrio Tube INC | Warren | MI | — | ◇ UNVERIFIED |
| TMTriple M Steel LLC | Madison Heights | MI | — | ◇ UNVERIFIED |
| TSTriple S Dynamics INC | Cibolo | TX | — | ◇ UNVERIFIED |
| TSTriple Steel LLC | La Vergne | TN | — | ◇ UNVERIFIED |
| TRTri Red, LLC | Rush Springs | OK | — | ◇ UNVERIFIED |
| TSTri State Cold Formed Steel Components LLC | Shepherdsville | KY | — | ◇ UNVERIFIED |
| TCTri-state Corp., LLC | Salisbury | NC | — | ◇ UNVERIFIED |
| TCTri-state Corp., LLC | Granite Quarry | NC | — | ◇ UNVERIFIED |
| TFTri-state Fabrication & Machining, LLC | Newark | DE | — | ◇ UNVERIFIED |
| TITri-State Industries of Tulsa LLC | Tulsa | OK | — | ◇ UNVERIFIED |
| TSTri State Iron Works INC | Memphis | TN | — | ◇ UNVERIFIED |
| TITri-state Ironworks INC | Memphis | TN | — | ◇ UNVERIFIED |
| TMTri-state Machine | Wheeling | WV | — | ◇ UNVERIFIED |
| TCTri-steel Corporation | Bakersfield | CA | — | ◇ UNVERIFIED |
| TFTri-steel Fabricators, INC. | Sims | NC | — | ◇ UNVERIFIED |
| TTri-tech | Austell | GA | — | ◇ UNVERIFIED |
| TSTriview Steel & Supply INC. | Sioux City | IA | — | ◇ UNVERIFIED |
| TMTri-way Metalworkers, INC. | Shenandoah | PA | — | ◇ UNVERIFIED |
| TRTri-way Rebar INC. | Ravenna | OH | — | ◇ UNVERIFIED |
| TITRMM Industries | Milford | DE | — | ◇ UNVERIFIED |
| TTTrojan Tube Sales and Fabrications INC. | Muncy | PA | — | ◇ UNVERIFIED |
| TTrostel | Mcallen | TX | — | ◇ UNVERIFIED |
| TRT. Rowe Pipe, LLC | Ponca City | OK | — | ◇ UNVERIFIED |
| TBTruck Bodies & Equipment International, INC. | Tishomingo | MS | — | ◇ UNVERIFIED |
| TMTruemark Metals, LLC | Alabaster | AL | — | ◇ UNVERIFIED |
 Truenorth Steel - Huron | Huron | SD | — | ◇ UNVERIFIED |
| Truenorth Steel INC | Saint Paul | MN | — | ◇ UNVERIFIED |
| Truenorth Steel, INC. | Missoula | MT | — | ◇ UNVERIFIED |
 Tru Flow Systems INC. | Lake Point | UT | — | ◇ UNVERIFIED |
| TWTr Welding, INC. | Rupert | ID | — | ◇ UNVERIFIED |
| TITsgc, INC. | Corpus Christi | TX | — | ◇ UNVERIFIED |
| TMTSG Management, LLC | Wyandotte | MI | — | ◇ UNVERIFIED |
| TMTsi/architectural Metals, INC. | Upper Marlboro | MD | — | ◇ UNVERIFIED |
| TTT&s Tubular Solutions | Hale | MI | — | ◇ UNVERIFIED |
| TDT.t.i. Dba Clearflow Valve | Berkeley | CA | — | ◇ UNVERIFIED |
| TIT&t Industrial Spray Coating | Lowell | MA | — | ◇ UNVERIFIED |
| TTT&t Towers, INC. | Kahului | HI | — | ◇ UNVERIFIED |
| TFTube Fab Roman Engineering CO INC | Afton | MI | — | ◇ UNVERIFIED |
| TFTube Forgings of America INC | Portland | OR | — | ◇ UNVERIFIED |
 Tube Processing Corporation | Southport | IN | — | ◇ UNVERIFIED |
| TPTube Products Corporation | Burnsville | MN | — | ◇ UNVERIFIED |
| TITubes, INC | Geismar | LA | — | ◇ UNVERIFIED |
| TSTube Solutions | Costa Mesa | CA | — | ◇ UNVERIFIED |
| TMTubesource Manufacturing INC | Ferndale | MI | — | ◇ UNVERIFIED |
| TSTube Specialties Co., INC. | Statesville | NC | — | ◇ UNVERIFIED |
| TCTubodyne CO | East Providence | RI | — | ◇ UNVERIFIED |
| TPTubular Products&stamping Division Linco | Jacksboro | TN | — | ◇ UNVERIFIED |
| TSTubular Solutions | Houston | TX | — | ◇ UNVERIFIED |
| TSTubular Solutions INC | Portland | OR | — | ◇ UNVERIFIED |
| TITunl Industries, INC | Irvine | CA | — | ◇ UNVERIFIED |
| TSTurlock Sheet Metal & Welding Dba P&f Metals | Turlock | CA | — | ◇ UNVERIFIED |
| TMTurnbull Metal Products | Gulfport | MS | — | ◇ UNVERIFIED |
| TETurner Equipment Company, INC. | Goldsboro | NC | — | ◇ UNVERIFIED |
| TITurner Industries | Pasadena | TX | — | ◇ UNVERIFIED |
| TITurner Industries Group LLC - Pipe Fabrication Division | New Iberia | LA | — | ◇ UNVERIFIED |
| TITurner Industries Group Paris Plant | Paris | TX | — | ◇ UNVERIFIED |
| TMTurner Mfg. CO. INC. | Fresno | CA | — | ◇ UNVERIFIED |
| TOT&v Optimum, LLC | Lockhart | TX | — | ◇ UNVERIFIED |
| TITwenty-Two, Inc. | Mundelein | IL | — | ◇ UNVERIFIED |
| TVTyco Valves & Controls | Prophetstown | IL | — | ◇ UNVERIFIED |
| UPUlrich Process Piping, LLC | Greensboro | NC | — | ◇ UNVERIFIED |
| USUltimate Steel & Fabrication LLC | Mechanicsville | MD | — | ◇ UNVERIFIED |
| UWUltimate Workmanship LLC | Cedar City | UT | — | ◇ UNVERIFIED |
| UPUltra Premium Oilfield Services | Odessa | TX | — | ◇ UNVERIFIED |
| UMUmi Metalfab | Menomonee Falls | WI | — | ◇ UNVERIFIED |
| UPUnderground Products, Inc. | Houston | TX | — | ◇ UNVERIFIED |
| USUnico Steel, INC. | City of Industry | CA | — | ◇ UNVERIFIED |
| UTUniform Tubes INC | South Plainfield | NJ | — | ◇ UNVERIFIED |
| UMUnion Metal - Canton | Canton | OH | — | ◇ UNVERIFIED |
| UMUnion Metal Industries CORP | Canton | OH | — | ◇ UNVERIFIED |
| UTUnion Tag Manufacturing | Raiford | FL | — | ◇ UNVERIFIED |
| UVUnion Valve Svc & Supply | Ripley | WV | — | ◇ UNVERIFIED |
| UFUnique Firestop Products, INC. | Robertsdale | AL | — | ◇ UNVERIFIED |
| UCUnited Casing Tubular Services | Midland | TX | — | ◇ UNVERIFIED |
| UCUnited Casing Tubular Services Sheldon Road | Houston | TX | — | ◇ UNVERIFIED |
| UMUnited Metalcraft, INC. | Marietta | GA | — | ◇ UNVERIFIED |
| UMUnited Millwright LLC | Mt Zion | IL | — | ◇ UNVERIFIED |
| UMUnited Millwright LLC | Mt Zion | IL | — | ◇ UNVERIFIED |
| UMUnited Misc & Ornamental Steel INC Dba Umo Steel INC | Union City | CA | — | ◇ UNVERIFIED |
| UPUnited Panel Corporation | Griffin | GA | — | ◇ UNVERIFIED |
| UPUnited Panel Corporation | Cartersville | GA | — | ◇ UNVERIFIED |
| USUnited Sprinkler INC | Rush City | MN | — | ◇ UNVERIFIED |
| USUnited States Pipe and Foundry Company LLC | Rogers | MN | — | ◇ UNVERIFIED |
| USUnited States Pipe and Foundry Company, LLC | — | IL | — | ◇ UNVERIFIED |
| USUnited Steel Fabricators INC | Rialto | CA | — | ◇ UNVERIFIED |
| USUnited Steel, INC. | Wichita | KS | — | ◇ UNVERIFIED |
| USUnited Steel Products | Largo | FL | — | ◇ UNVERIFIED |
| USUnited Steel Products Company, INC. | Livermore | CA | — | ◇ UNVERIFIED |
| USUnited Steel Works, INC. | Clearwater | FL | — | ◇ UNVERIFIED |
| USUnited Steel Works, INC. | Clearwater | FL | — | ◇ UNVERIFIED |
