Appleton STB-400 Industrial Electrical Connectors

The Appleton STB-400 is a 4-inch straight liquid-tight conduit connector with an insulated throat, designed to terminate liquid-tight flexible conduit (LFMC) into a metal enclosure while protecting conductor insulation and providing a sealed entry. It combines a malleable iron body with a zinc electroplate, chromate conversion, and epoxy powder coat finish, an aluminum ferrule, a plastic throat liner, and a polypropylene sealing ring to resist abrasion and moisture ingress. This STB-400 is listed for UL 514B and CSA C22.2 LFMC installations and is offered in trade size 4 inches for straight configurations. Common in commercial and industrial environments, it provides a secure entry for LFMC into enclosures, consistent with Appleton’s STB connector family.