| MCMueller CO | Decatur | IL | — | ◇ UNVERIFIED |
| MCMueller CO | Decatur | IL | — | ◇ UNVERIFIED |
| MCMuncie Casting CORP | Muncie | IN | — | ◇ UNVERIFIED |
| MMur-tex | Amarillo | TX | — | ◇ UNVERIFIED |
| NCNail City Bronze INC | Wheeling | WV | — | ◇ UNVERIFIED |
| NONational Oilwell Varco | Belton | TX | — | ◇ UNVERIFIED |
| NONational Oilwell Varco/tulsa Multiplex | Tulsa | OK | — | ◇ UNVERIFIED |
| NGNemak Glasgow Plant #1 | Glasgow | KY | — | ◇ UNVERIFIED |
| NINibco INC | Blytheville | AR | — | ◇ UNVERIFIED |
| NNNibco Nacogdoches Plant | Nacogdoches | TX | — | ◇ UNVERIFIED |
| NFNorthern Foundry | Hibbing | MN | — | ◇ UNVERIFIED |
| NINorthern Iron & Machine | Saint Paul | MN | — | ◇ UNVERIFIED |
| NPNta Precision Axle CORP | Carol Stream | IL | — | ◇ UNVERIFIED |
| OCO'brien Corp/cardinal Uhp | Saint Louis | MO | — | ◇ UNVERIFIED |
| OIOsco Industries, INC. New Boston Divisi (0773010180) | New Boston | OH | — | ◇ UNVERIFIED |
| OIOsco Industries INC Portsmouth Div | Portsmouth | OH | — | ◇ UNVERIFIED |
| OKO.s. Kelly Company (0812100276) | Springfield | OH | — | ◇ UNVERIFIED |
| PIPace Industries, INC. | Harrison | AR | — | ◇ UNVERIFIED |
| PIPandel INC | Cartersville | GA | — | ◇ UNVERIFIED |
| PMPeco Manufacturing | Clackamas | OR | — | ◇ UNVERIFIED |
| PCPella Corporation- Murray Operations | Murray | KY | — | ◇ UNVERIFIED |
| PFPentair Flow Technologies, LLC - Ashland Pump Plant (0303010175) | Ashland | OH | — | ◇ UNVERIFIED |
| PFPier Foundry | Saint Paul | MN | — | ◇ UNVERIFIED |
| PMPlant Maintenance Services - Pms St Gabriel Plant | Saint Gabriel | LA | — | ◇ UNVERIFIED |
| PIPlastron Incorporated | City of Industry | CA | — | ◇ UNVERIFIED |
| PCPort City Metal Products | Muskegon | MI | — | ◇ UNVERIFIED |
| PMPrecision Metalsmiths INC. | Markesan | WI | — | ◇ UNVERIFIED |
 Precision Products Group, INC. | Apple Creek | OH | — | ◇ UNVERIFIED |
| PFProspect Foundry LLC | Minneapolis | MN | — | ◇ UNVERIFIED |
| QCQuaker City Castings (0215090009) | Salem | OH | — | ◇ UNVERIFIED |
| QCQuality Castings CO | Waukesha | WI | — | ◇ UNVERIFIED |
 Quality Metal Finishing | Byron | IL | — | ◇ UNVERIFIED |
| RPRane Precision Die Casting | Russellville | KY | — | ◇ UNVERIFIED |
| RIReckless Industries | Maryville | TN | — | ◇ UNVERIFIED |
| RIReckless Industries Mold Division LLC | Greenback | TN | — | ◇ UNVERIFIED |
| RAResrg Automotive Trim LLC | Morehead (rowan) | KY | — | ◇ UNVERIFIED |
| RHR H Sheppard CO INC | Hanover | PA | — | ◇ UNVERIFIED |
| RIRichmond Industries INC | Dayton | NJ | — | ◇ UNVERIFIED |
| RBRobert Bosch Automotive Steering LLC | Florence | KY | — | ◇ UNVERIFIED |
| RIRomac Industries | Sultan | WA | — | ◇ UNVERIFIED |
| RBRoyal Baths Manufacturing CO | Richland Hills | TX | — | ◇ UNVERIFIED |
| RBRoyal Baths Manufacturing Company | Clearwater | FL | — | ◇ UNVERIFIED |
| SOSawyer Oilfield Brownwood Facility | Brownwood | TX | — | ◇ UNVERIFIED |
| SCSika Corporation-greer Plant | Greer | SC | — | ◇ UNVERIFIED |
 Sioux City Foundry CO | South Sioux City | NE | — | ◇ UNVERIFIED |
| SASlw Automotive INC / Sallisaw Plt | Sallisaw | OK | — | ◇ UNVERIFIED |
| SASmp Automotive Systems Ala | Cottondale | AL | — | ◇ UNVERIFIED |
| SRS R Smith Manufacturing | Canby | OR | — | ◇ UNVERIFIED |
| SAStandard Alloys Port Arthur | Port Arthur | TX | — | ◇ UNVERIFIED |
| SUStarpipe USA Dba Sp Foundry / Sp Foundry | South Coffeyville | OK | — | ◇ UNVERIFIED |
