This chromed brass adapter nut allows you to use a 1/4" NPT Petcock on any tank with a standard Harley type 22mm threaded male bung

these breather bolts are engineered for functionality

The size of the housing is 1 7/8" diameter x 1" long

These threaded steel bungs are 3/4" diameter and are drilled and tapped all the way through with 5/16"-18 thread

These are heavy-duty springs that are chrome plated for superior corrosion resistance

#8147-13 Transmission Top Cover Screw Kit 1956-1964 Harley-Davidson Big Twins - Chrome Plated Brand_Biltwell This chromed brass adapter nutTransmission Top Cover Screw Kit Chrome Plated Fits 1956 64 Harley Davidson Big Twins. Made in Ohio, USA.