Thomas & Betts 460-TB Bushed Elbow Brand: Thomas & Betts. Part Number: 460-TB. T&B Bushed Elbow, Non-Insulated, 1/2 in, 90 deg, For Use With: Rigid/IMC Conduits, Malleable Iron, 1-13/16 in L x 1-1/8 in W. Additional Description: TB -460-TB 14/2IN BUSHED ELBOW NONINSUL IRON. Catalog Description: 1/2 Inch Bushed Elbow, Malleable Iron for Use with Rigid/IMC Conduit..