Specification grade insulated grounding bushing made of steel with mechanical/hot dip galvanized and stainless steel screws. For threaded rigid conduit and IMC. Copper conductor. Allows easy insertion of grounding conductor for through or end connection. Spring action design maintains positive firm contact on grounding conductor. Set screw provides fixed alignment and positive ground continuity. Phenolic insulation, with 150 °C UL rating, molded on over metallic conduit stop will not shatter or shrink at sub-zero temperatures.