T&B 680-TB, 2″, Malleable Iron, Threaded, IMC/Rigid Conduit Coupling, 1 pc T&B 681, 2-1/2", Malleable Iron, 3-Piece, Threaded, Rigid Conduit Coupling, 1 pc. T&B 683, 3-1/2", Malleable Iron, 3-Piece, Threaded, Rigid Conduit Coupling, 1 pc. T&B 675, 1/2", Steel, 3-Piece, Threaded, IMC/Rigid Conduit Coupling, 1 pc. byJuly 3, 2026Last Updated on: July 4, 2026