Robroy Stainless Hygienic Hubs are designed to connect threaded stainless steel conduit to a threadless opening in a box or an enclosure. Robroy Stainless Hygienic Hubs are 316 stainless steel and are available with or without ground nut. Robroy Stainless Hygienic Hubs have an FDA approved circular silicone conduit entry gasket.