The Bridgeport 143 1" Steel Sealing Locknut is designed for use with rigid and intermediate metal conduit. Made of steel with a PVC seal, it provides a secure and flexible connection for electrical installations. The screw mounting style and silver color make it easy to identify and install in conduit fittings. Manufactured in the United States, this sealing locknut is a reliable accessory for electrical equipment and supplies in various industrial and commercial settings.