EMT steel set screw connector with insulated throat. Ideal for use indoors. The throat is insulated with long-lasting nylon for easier installation. Features screw threads designed to prevent the screw from vibrating loose. Body and locknut die-cast of high-strength zinc alloy. Use to connect EMT conduit to steel outlet box, load center, or other metal enclosure. Reversible locknut cuts through protective coatings on boxes and enclosures to assure ground continuity. Concrete-tight when taped.