Designed for unequalled performance. The innovative engineering of the T&B® Hub will, quite simply, raise your performance expectations for threaded hubs. Sealing Ring and Groove with innovative profile outperforms standard ‘O’ ring design. Sealing ring is captivated in place before installation and resists buckling or slipping during installation. The seal groove is designed for optimum compression of the sealing ring. The sealing ring is designed to provide a complete 360° seal, even when the conduit is not perpendicular with the enclosure. Locknut Design with peripheral slots and a hexagonal/angled spline spaced every 30° enables easy application of torque with wrench or hammer and screwdriver. Sharper and Deeper Teeth on locknut and body designed for a more penetrating bite for improved bonding to the enclosure. Hexagonal/Splined Body Design for fast, easy installation with wrench or hammer and screwdriver. Precision Machined Tapered Threads designed to create watertight union. Insulated Throat molded from 105° C rated thermoplastic with a flammability rating of 94 V-O.