IMC/Rigid Conduit Bushing; Type Threaded Female; Trade Size 2-1/2 Inch; Diameter 3-1/8 Inch; Height 13/16 Inch; Throat Type Insulated; Temperature Rating 150 Deg C; Material Zinc Electroplated Malleable Iron; Standard Package 10; Approval UL 514B; Used On IMC/Rigid Conduit; ROHS Compliant; Applicable Standard Federal Specification A-A-50553, NEMA FB-1; Used with Locknut