Nylon compression nut has a tapered dome to tighten ferrule onto conduitNeoprene O-ring provides liquidtight sealNon-integral ferrule provides conduit seal and pullout protectionNeoprene sealing ring-30 to 225 deg F operating temperature
Hubbell Wiring Device-Kellems PolyTuff® P050NBKA Straight Male Conduit Connector, 1/2 in Trade, Nylon, Smooth