| TFTexaloy Foundry | Floresville | TX | 20–99 | ◐ LIKELY ACTIVE |
| TAThales Avionics INC CA | Irvine | CA | 100–499 | ◐ LIKELY ACTIVE |
| TCThe Chris Erhart Foundry and Machine Co. | Cincinnati | OH | 1–19 | ◐ LIKELY ACTIVE |
| TFTownley Foundry & Machine Company, INC | Candler | FL | 100–499 | ◐ LIKELY ACTIVE |
| TFTrio Foundry Inc | Montgomery | IL | 20–99 | ◐ LIKELY ACTIVE |
| TFTrumbull Foundry and Alloy Federal Street | Niles | OH | 20–99 | ◐ LIKELY ACTIVE |
| TCTte Casting Technologies INC | Oak Ridge | TN | 20–99 | ◐ LIKELY ACTIVE |
| VMVestal Manufacturing Company | Sweetwater | TN | 100–499 | ◐ LIKELY ACTIVE |
| VLVictaulic Lawrenceville | Tioga | PA | 100–499 | ◐ LIKELY ACTIVE |
| WTWear Tek | Spokane | WA | 20–99 | ◐ LIKELY ACTIVE |
| WFWinnebago Foundry INC | South Beloit | IL | 20–99 | ◐ LIKELY ACTIVE |
| WCWolverine Carbide and Tool INC | Troy | MI | 20–99 | ◐ LIKELY ACTIVE |
| ADAallied Die Casting CO of Illinois | Franklin Park | IL | — | ◇ UNVERIFIED |
| AFAlbco Foundry and Machine, INC. | Lisbon | OH | — | ◇ UNVERIFIED |
| ALAlutech LLC | Benton Harbor | MI | — | ◇ UNVERIFIED |
| ARArmsted Rail Company INC | Hammond | IN | — | ◇ UNVERIFIED |
| BCBesser CO | Sioux City | IA | — | ◇ UNVERIFIED |
| BQBesser Quinn Machine & Foundry | Boone | IA | — | ◇ UNVERIFIED |
| BRBlue Ridge Pressure Castings | Lehighton | PA | — | ◇ UNVERIFIED |
| BFBoyertown Foundry Company | New Berlinville | PA | — | ◇ UNVERIFIED |
| BHBrembo Homer Foundry | Homer | MI | — | ◇ UNVERIFIED |
| BIBrewton Iron Works INC | Brewton | AL | — | ◇ UNVERIFIED |
| CBCasper Brass Foundry | Mills | WY | — | ◇ UNVERIFIED |
| CUCastings USA INC | New Philadelphia | OH | — | ◇ UNVERIFIED |
| CRCast Rite CORP | Gardena | CA | — | ◇ UNVERIFIED |
| CICaterpillar INC - Mapleton Facility | Mapleton | IL | — | ◇ UNVERIFIED |
| CCCentral Castings CORP | Anniston | AL | — | ◇ UNVERIFIED |
| CPCharlotte Pipe and Foundry Company | Charlotte | NC | — | ◇ UNVERIFIED |
| CMCharter Manufacturing CO INC | Woodstock | IL | — | ◇ UNVERIFIED |
| CKChrysler Kokomo Casting Plant | Kokomo | IN | — | ◇ UNVERIFIED |
| CVClow Valve CO - Foundry | Oskaloosa | IA | — | ◇ UNVERIFIED |
| CWClow Water Systems Company | Coshocton | OH | — | ◇ UNVERIFIED |
| CECockburn Enterprises INC | Muscle Shoals | AL | — | ◇ UNVERIFIED |
| CCCol-pump Company, INC. (0215010001) | Columbiana | OH | — | ◇ UNVERIFIED |
| CMConsolidated Metco | Clackamas | OR | — | ◇ UNVERIFIED |
| CCCosma Casting Mich-battle Ck | Battle Creek | MI | — | ◇ UNVERIFIED |
| CDCrouse-hinds Div of Cooper Inds | Amarillo | TX | — | ◇ UNVERIFIED |
| CCCrown Casting INC | Hodges | SC | — | ◇ UNVERIFIED |
| CPCulvert Placement and Storage Area Expansion for Waupaca Foundry Plant 5 Facilit | Tell City | IN | — | ◇ UNVERIFIED |
| DCDalton CORP Warsaw Mfg Facility | Warsaw | IN | — | ◇ UNVERIFIED |
| DFDecatur Foundry, INC. | Decatur | IL | — | ◇ UNVERIFIED |
| DFDeeter Foundry | Lincoln | NE | — | ◇ UNVERIFIED |
| DCDmi Columbus, LLC | Columbus | GA | — | ◇ UNVERIFIED |
| DIDonsco Inc/mt Joy | Mount Joy | PA | — | ◇ UNVERIFIED |
| DIDotson Iron Castings | Mankato | MN | — | ◇ UNVERIFIED |
| DIDwyer Instruments | La Porte | IN | — | ◇ UNVERIFIED |
| EJEast Jordan Foundry LLC | Elmira | MI | — | ◇ UNVERIFIED |
| EIEbaa Iron Eastland Plant | Eastland | TX | — | ◇ UNVERIFIED |
| EIEbaa Iron Jack Rabbit Division | Albany | TX | — | ◇ UNVERIFIED |
| EFEnkei Fla INC. & Tech Paint of Jax | Jacksonville | FL | — | ◇ UNVERIFIED |