| BFBeaver Falls Machine Shop | Beaver Falls | PA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| BFBeaver Falls Tubular Prodllc/beaver Falls Plt | Beaver Falls | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BTBeco Tek Mfg INC | Lorain | OH | Primary Metal Manufacturing331522 | — | ◇ UNVERIFIED |
| BIBee-jay Industries INC | Harwood Heights | IL | Primary Metal Manufacturing331523 | — | ◇ UNVERIFIED |
| BSBeemsterboer Slag Corporation a Contractor of Cleveland-clif | Burns Harbor | IN | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| BIBehr Iron & Metal | Peoria | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BCBekaert Corporation | Shelbyville | KY | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| BIBekaert INC | Clarksdale | MS | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| BCBelcher (advanced Cast Products) | Easton | MA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BCBelden Cdt INC. | Tompkinsville | KY | Primary Metal Manufacturing331319 | — | ◇ UNVERIFIED |
| BCBelden Communications Div | Phoenix | AZ | Primary Metal Manufacturing331421 | — | ◇ UNVERIFIED |
| BWBelden Wire and Cable | Essex Junction | VT | Primary Metal Manufacturing331422 | — | ◇ UNVERIFIED |
| BWBelden Wire and Cable CO | Fort Mill | SC | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| BFBell Foundry CO | South Gate | CA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BTBellville Tube | Bellville | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BSBelmont Solids Control | Campbell | OH | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| BABenada Aluminum of Florida, INC | Miami | FL | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| BMBenton Metal Recycling | Benton Harbor | MI | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| BCBentonville Castings Company | Bentonville | AR | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BBBerman Bros Iron & Metal CO INC - Bermco Aluminum | Bessemer | AL | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| BIBest in Bronze INC | Kalispell | MT | Primary Metal Manufacturing331525 | — | ◇ UNVERIFIED |
| BCBhp Copper North America San Manuel Operations | San Manuel | AZ | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| BCBiccgeneral Cable Industries | Scottsville | TX | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| BSBigbee Steel & Tank CO | Manheim | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| BFBig Four Foundries CORP | Tulsa | OK | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BHBiggs Hardware and Auto Supply | Wirth | AR | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| BFBlackhawk Foundry & Machine CO | Davenport | IA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BWBlaine Window Hardware | Hagerstown | MD | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| BIBlastech, INC. | Gary | IN | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| BFBloomfield Foundry, INC | Bloomfield | IA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BCBluetree Casework LLC | St Joseph | MO | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| BABodine Aluminum, INC | Saint Louis County | MO | Primary Metal Manufacturing331528 | — | ◇ UNVERIFIED |
| BABodine Aluminum Inc-walton Road | St. Louis | MO | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| BDBohn & Dawson | Kirkwood | MO | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BABonnell Aluminum, INC. | Carthage | TN | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| BCBorg Compressed Steel CORP | Tulsa | OK | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| BGBoyce Galvanizing LLC | Big Spring | TX | Primary Metal Manufacturing331112 | — | ◇ UNVERIFIED |
| BFBoyertown Foundry Co/fka Eafco | New Berlinville | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BABradken - Amite - Foundry | Amite | LA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| BABraidy Atlas Mill | Ashland | KY | Primary Metal Manufacturing331315 | — | ◇ UNVERIFIED |
| BCBranchfield Casting | Galva | IL | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| BBBrass & Bronze Casting CO | Irwin | PA | Primary Metal Manufacturing331522 | — | ◇ UNVERIFIED |
| BGBrassworks Gallery | Portland | OR | Primary Metal Manufacturing331525 | — | ◇ UNVERIFIED |
| BFBrendle Fire Equipment, INC. | Montgomery | AL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BIBridgeport Insulated Wire CO | Stratford | CT | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| BABridon American CORP | Exeter | PA | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| BEBrighton Electric Steel Casting CO | Beaver Falls | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| BIBrillion Iron Works, INC. | Brillion | WI | Primary Metal Manufacturing331510 | — | ◇ UNVERIFIED |
| BTBrimmer Turan Foundry and Machine Shop | Gulfport | MS | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| BIBristol Indiana Corporation Dba Brinco | Bristol | IN | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
