Threaded O-Ring Plug UNF 1/2-20 HDPE Red

This 1/2"-20 UNF threaded molded o-ring plug is often used on flat faced hydraulic fittings. It's integral o-ring type bead prevents oil leaks or entrance of contaminants. The flange lip compresses against the surface to keep contaminants out. This plug can be applied or removed by hand, wrench, socket or screwdriver.