FeaturesHexagonal/splined body and locknut enable fast and easy installationMeets NEMA sealing requirements for name 3R/4/4X/13 enclosuresT and b grounding hub is made of type 316 stainless steel for high-strengthIt has a locknut design with peripherals slots and has a spline spaced every 30 deg that allows easy application of torque with screwdriverIt has machined tapered threads to offer watertight sealing