Leak Free lid Bulkhead w/ o-ring washer and lock nut

1/4" FNPT x 5/16-18 Bulkhead

This bulkhead has a 1/4" FNPT threaded adapter and a 5/16-18 threaded screw adapter and is made out of nickel plated brass and comes with a buna-n O-ring, stainless steel washer, and nylon locknut.