IMC/Rigid Conduit Bushing; Type Threaded Female; Trade Size 4 Inch; Diameter 4-7/8 Inch; Height 1 Inch; Throat Type Insulated; Temperature Rating 150 Deg C; Material Zinc Electroplated Malleable Iron; Standard Package 5; Approval UL 514B; Used On IMC/Rigid Conduit; ROHS Compliant; Applicable Standard Federal Specification A-A-50553, NEMA FB-1; Used with Locknut