The Bridgeport 3/4" Die Cast Zinc Insulated Conduit Nipple serves as a short raceway between enclosures or boxes when used with a locknut. Conduit nipples are used to extend a conduit system. This nipple features NPSM threads. Short Raceway: Users can extend a conduit system by using the conduit nipple with a locknut Insulated Throat: The nipple features an insulated throat that is rated up to 105°C NPSM Threads: Operators can create a pressure-tight, vibration-resistant seal when the male and female threads are properly connected Zinc Die Cast Body: The zinc die cast body is naturally resistant to corrosion for long-term use in any environment