FeaturesWide range of styles, trade sizes and materials to meet customer requirements and preferencesMultiple certifications provide users peace of mindEasy installation and smooth pulling service for labor savingsTapered female threads for rigid/IMC conduit, NPSM male threadsLexan insulinerGasket Viton O-ringSteel/stainless steel ground screwVibration proof - strong, oversize nut with radial serrations assures flush installation and positive groundingGrounding screw for added safetyCaptive O-ring gasket impervious to corrosive moisture and petroleum productsGasket assures positive watertight and dusttight installationsPrecision machine cut NPT threads - positive fit and simple installationNo welding - unique serrations ON both nut and hub bite into metal assuring a positive electrical groundPosi-Lok insulated throat - cannot come outHub is listed for use in hazardous (classified) locations to IECEx-ATEX certifications#8 CSA and #8 UL maximum copper ground wire