| OPOmega Plating | Crestwood | IL | — | ◇ UNVERIFIED |
| OSO'neal Steel INC | Greensboro | NC | — | ◇ UNVERIFIED |
| OSOneal Steel INC | Ambridge | PA | — | ◇ UNVERIFIED |
| OCOttenweller CO INC | Mount Airy | NC | — | ◇ UNVERIFIED |
| OSOwen Steel Company | Wilmington | DE | — | ◇ UNVERIFIED |
| OWO W Hubbell & Sons | Ny Mills | NY | — | ◇ UNVERIFIED |
| PMPackless Metal Hose & Texas Copper Works Divisions | Waco | TX | — | ◇ UNVERIFIED |
| PPParadigm Precision | Malden | MA | — | ◇ UNVERIFIED |
| PHParker Hannifin CORP | Richland | MI | — | ◇ UNVERIFIED |
| PHParker Hannifin CORP | Mason | MI | — | ◇ UNVERIFIED |
| PHParker Hannifin CORP Cylinder Div | Saint Marys | OH | — | ◇ UNVERIFIED |
| PHParker Hannifin CORP Cylinder Div Ashley in | Ashley | IN | — | ◇ UNVERIFIED |
| PHParker Hannifin Sporlan Div - Plant 1 | Washington | MO | — | ◇ UNVERIFIED |
| PIPeerless Industries | Ypsilanti | MI | — | ◇ UNVERIFIED |
| PTPentagon Technologies Group INC | Hopewell Junction | NY | — | ◇ UNVERIFIED |
| PFPerkinelmer Fluid Sciences | Beltsville | MD | — | ◇ UNVERIFIED |
| PMPioneer Metal Finishing-monroe | Monroe | MI | — | ◇ UNVERIFIED |
| PIPirod INC | Plymouth | IN | — | ◇ UNVERIFIED |
| PIPlateco INC | Reedsburg | WI | — | ◇ UNVERIFIED |
| PCPorter-guertin CO | Cincinnati | OH | — | ◇ UNVERIFIED |
| PMPrecise Machining & Manufacturing LLC | Tulsa | OK | — | ◇ UNVERIFIED |
| PDPrecision Drawn Metals INC | Janesville | WI | — | ◇ UNVERIFIED |
| PIPrecisionform INC | Lititz | PA | — | ◇ UNVERIFIED |
| PHPrecision Husky Corporation | Moody | AL | — | ◇ UNVERIFIED |
 Precision International LLC | Sistersville | WV | — | ◇ UNVERIFIED |
| PMPrecision Machine INC | Paducah | KY | — | ◇ UNVERIFIED |
| PPProduction Products CO | East Syracuse | NY | — | ◇ UNVERIFIED |
| PSProspect Steel Company | Little Rock | AR | — | ◇ UNVERIFIED |
| QLQcc LLC | Harwood Heights | IL | — | ◇ UNVERIFIED |
| QQsi | Dothan | AL | — | ◇ UNVERIFIED |
 Quality Plating of Tulsa INC / 2665 N Darlington | Tulsa | OK | — | ◇ UNVERIFIED |
| RIRansohoff INC | Cincinnati | OH | — | ◇ UNVERIFIED |
| RLRaytheon Lemmon Avenue | Dallas | TX | — | ◇ UNVERIFIED |
| RBR. B. Royal Industries | Fond Du Lac | WI | — | ◇ UNVERIFIED |
| RIRebco Inc/kersey | Kersey | PA | — | ◇ UNVERIFIED |
| REReliance Electric CO. | Cleveland | OH | — | ◇ UNVERIFIED |
| RSRexnord Seal Division | Wheeling | IL | — | ◇ UNVERIFIED |
| RIRichards Industrials INC | Cincinnati | OH | — | ◇ UNVERIFIED |
| RARobine and Welch Machine and Tool Company INC | Laurel | MS | — | ◇ UNVERIFIED |
| RSR.w. Screw Products, INC. | Massillon | OH | — | ◇ UNVERIFIED |
| SISabre Industries Conroe Tx Facility | Conroe | TX | — | ◇ UNVERIFIED |
| SSSamuel Son and Company (usa) INC | Iuka | MS | — | ◇ UNVERIFIED |
| SSSamuel Son and CO USA INC | Heath | OH | — | ◇ UNVERIFIED |
| SGSas Global Fka Sure Alloy Steel Corporation | Warren | MI | — | ◇ UNVERIFIED |
| STSauk Technologies | Saukville | WI | — | ◇ UNVERIFIED |
| SPSav-on Plating INC | Phoenix | AZ | — | ◇ UNVERIFIED |
 Schuff Steel | Bellemont | AZ | — | ◇ UNVERIFIED |
| Schuff Steel CO | Eloy | AZ | — | ◇ UNVERIFIED |
| Schuff Steel Company | Stockton | CA | — | ◇ UNVERIFIED |
| SCSchumacher CO INC | Houston | TX | — | ◇ UNVERIFIED |
| SASenior Aerospace Absolute Manufacturing | Arlington | WA | — | ◇ UNVERIFIED |
| SOSfi of Arkansas | Conway | AR | — | ◇ UNVERIFIED |
| S1Shape 1820 | Grand Haven | MI | — | ◇ UNVERIFIED |
| SCSilgan Closures Fka Amcor White Cap | Hazleton | PA | — | ◇ UNVERIFIED |
| SCSilgan Containers Mfg CORP | Menomonie | WI | — | ◇ UNVERIFIED |
| SMSimmons Manufacturing | Mcdonough | GA | — | ◇ UNVERIFIED |
| SISimpson Industries INC * | Edon | OH | — | ◇ UNVERIFIED |
| SSSkilcraft Sheetmetal INC | Burlington | KY | — | ◇ UNVERIFIED |
| SESmith Equipment Manufacturing | Watertown | SD | — | ◇ UNVERIFIED |
| SISmiths Ind Aerospace & Defense Sys | Clearwater | FL | — | ◇ UNVERIFIED |
| STSms Technical Services LLC | Osceola | AR | — | ◇ UNVERIFIED |
| SPSouthwestern Plating Houston Plant | Houston | TX | — | ◇ UNVERIFIED |
| SMSpecialty Metals Processing, INC. | Stow | OH | — | ◇ UNVERIFIED |
| SISpeedring Inccorporated | Cullman | AL | — | ◇ UNVERIFIED |
| SCSpx CORP Lightning Div | Rochester | NY | — | ◇ UNVERIFIED |
| SFSpx Flow US INC | Delavan | WI | — | ◇ UNVERIFIED |
| SAStandard Aero (san Antonio) INC | San Antonio | TX | — | ◇ UNVERIFIED |
| SLStanley Labounty | Two Harbors | MN | — | ◇ UNVERIFIED |
 Steelfab of Virginia, INC. | Emporia | VA | — | ◇ UNVERIFIED |
| SFSteel Fabricators of Monroe LLC | Monroe | LA | — | ◇ UNVERIFIED |
 Steel Industries Plant 4 | Redford | MI | — | ◇ UNVERIFIED |
| SKSteel King Industries INC | New London | WI | — | ◇ UNVERIFIED |
| SPSterling Plating INC | Harwood Heights | IL | — | ◇ UNVERIFIED |
| SGSt George Steel Fabrication INC | Saint George | UT | — | ◇ UNVERIFIED |
| SPStratoflex Products Div | Fort Worth | TX | — | ◇ UNVERIFIED |
| SDStreator Dependable Manufacturing | Streator | IL | — | ◇ UNVERIFIED |
| SMSwagelok Manufacturing CO LLC | Cleveland | OH | — | ◇ UNVERIFIED |
| SMSwagelok Manufacturing CO LLC | Solon | OH | — | ◇ UNVERIFIED |
| SISystems INC | Germantown | WI | — | ◇ UNVERIFIED |
 Team Industries-audubon | Audubon | MN | — | ◇ UNVERIFIED |
| Team Industries Park Rapids | Park Rapids | MN | — | ◇ UNVERIFIED |
| TMTech Met Inc/glassport | Glassport | PA | — | ◇ UNVERIFIED |
| TTelsmith | Thiensville | WI | — | ◇ UNVERIFIED |
| TSTemtco Steel INC | Chicago | IL | — | ◇ UNVERIFIED |
| TSTemtco Steel Tumwater | Tumwater | WA | — | ◇ UNVERIFIED |
| TTerex | Huron | SD | — | ◇ UNVERIFIED |
| THTexas Honing INC - North Facility | Houston | TX | — | ◇ UNVERIFIED |
| TJThree J's Industries INC | Elk Grove Village | IL | — | ◇ UNVERIFIED |
| TUTimken US CORP Honea Path | Honea Path | SC | — | ◇ UNVERIFIED |
| TITri-con Industries, LTD. Manufacturing Plant | Lincoln | NE | — | ◇ UNVERIFIED |
| TGTrident Graphics NA LLC | Chester | VA | — | ◇ UNVERIFIED |
| THTrinity Highway Products LLC | Orangeburg | SC | — | ◇ UNVERIFIED |
| TITrinity Inds Head Div #56 | Navasota | TX | — | ◇ UNVERIFIED |
| TITrinity Industries Plant 26 | Fort Worth | TX | — | ◇ UNVERIFIED |
| TTTrinity Tank Car INC Plt 200 | Longview | TX | — | ◇ UNVERIFIED |
| TPTriplex Plating INC. | Michigan City | IN | — | ◇ UNVERIFIED |
| TATrw Automotive | Fenton | MI | — | ◇ UNVERIFIED |
 Tyco Fire Products Lubbock | Lubbock | TX | — | ◇ UNVERIFIED |
| TVTyco Valves & Controls Harlingen | Harlingen | TX | — | ◇ UNVERIFIED |
| UIUniversal Industrial Sales Incorporated- Galvanizing Facility | Lindon | UT | — | ◇ UNVERIFIED |
