| MEMetfab Engineering INC | Attleboro Falls | MA | — | ◇ UNVERIFIED |
 Meyer Utility Structures, LLC Plant #1662 | Steele | AL | — | ◇ UNVERIFIED |
| MSMica Steelworks Kaufman | Kaufman | TX | — | ◇ UNVERIFIED |
| MMMicro Matic USA INC | Brooksville | FL | — | ◇ UNVERIFIED |
| MMMiddleby Marshall Holdings LLC Dba Nu-vu Food Service Systems | Menominee | MI | — | ◇ UNVERIFIED |
| MPMnp Precision Parts LLC | Rockford | IL | — | ◇ UNVERIFIED |
| MWModern Welding CO of Tx | Rhome | TX | — | ◇ UNVERIFIED |
| MOMonotech of Mississippi | Iuka | MS | — | ◇ UNVERIFIED |
| MWMotor Wheel Commercial Vehicle Systems INC. | Berea | KY | — | ◇ UNVERIFIED |
| MIMscm Incorporated | Holland | MI | — | ◇ UNVERIFIED |
| MSMueller Systems | Cleveland | NC | — | ◇ UNVERIFIED |
| NNelco | Houston | TX | — | ◇ UNVERIFIED |
| NGNelson Global Products INC | Viroqua | WI | — | ◇ UNVERIFIED |
| NLNeofab, LLC | Miami | OK | — | ◇ UNVERIFIED |
| NANew Alenco Windows LTD | Bryan | TX | — | ◇ UNVERIFIED |
| NYNew York Blower Company | La Porte | IN | — | ◇ UNVERIFIED |
| NENorthern Engraving CORP - Sparta | Sparta | WI | — | ◇ UNVERIFIED |
| OIOmg INC | Agawam | MA | — | ◇ 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 Cylinder Div | Saint Marys | OH | — | ◇ UNVERIFIED |
| PHParker Hannifin Sporlan Div - Plant 1 | Washington | MO | — | ◇ UNVERIFIED |
 Paul Mueller Company | Osceola | IA | — | ◇ UNVERIFIED |
| PIPfaudler INC | Rochester | NY | — | ◇ UNVERIFIED |
| PIPirod INC | Plymouth | IN | — | ◇ UNVERIFIED |
| PCPonca City Metal Products Faclty | Ponca City | 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 |
| PMPremier Manufacturing | Tualatin | OR | — | ◇ 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 |
| 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 |
| RFRightway Fasteners, INC | Columbus | IN | — | ◇ UNVERIFIED |
| RSRing Screw Llc-sterling Hts | Sterling Heights | MI | — | ◇ UNVERIFIED |
| RARobine and Welch Machine and Tool Company INC | Laurel | MS | — | ◇ UNVERIFIED |
| RFRocknel Fastener INC | Rockford | IL | — | ◇ UNVERIFIED |
| RMRockwood Mfg Co/rockwood | Rockwood | PA | — | ◇ 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 |
| SSSamuel, Son & CO. (usa) INC. D/b/a Samuel Pressure Vessel Group- Tomahawk | Tomahawk | WI | — | ◇ UNVERIFIED |
| SGSas Global Fka Sure Alloy Steel Corporation | Warren | MI | — | ◇ UNVERIFIED |
| STSauk Technologies | Saukville | WI | — | ◇ UNVERIFIED |
 Schuff Steel | Bellemont | AZ | — | ◇ UNVERIFIED |
| Schuff Steel CO | Eloy | AZ | — | ◇ UNVERIFIED |
| Schuff Steel Company | Stockton | CA | — | ◇ UNVERIFIED |
| SMSelkirk Metalbestos | Nampa | ID | — | ◇ 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 |
| SMSmw Mfg Amsted Automotive Group-belleville | Belleville | MI | — | ◇ UNVERIFIED |
| SASouthern Aluminum Finishing CO Winston Paint | Villa Rica | GA | — | ◇ UNVERIFIED |
| SFSpecialty Fabrication & Powd Er Coating LLC | Franklin | PA | — | ◇ UNVERIFIED |
 Spg International LLC Br #x032 Universal Brand | Aurora | CO | — | ◇ UNVERIFIED |
| SCSpx CORP Lightning Div | Rochester | NY | — | ◇ UNVERIFIED |
| SFSpx Flow US INC | Delavan | WI | — | ◇ UNVERIFIED |
| SLStanley Labounty | Two Harbors | MN | — | ◇ UNVERIFIED |
| SPStar Precision | Longmont | CO | — | ◇ 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 |
| SGSt George Steel Fabrication INC | Saint George | UT | — | ◇ UNVERIFIED |
| SGStork Gamco Incorporated | Gainesville | GA | — | ◇ 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 |
| TUTimken US CORP Honea Path | Honea Path | SC | — | ◇ UNVERIFIED |
