The Wing'd Piston hooks it up with these super cool petcock adaptors to adapt a 1/4" or 18mm male tank bung to a 11/16" NPT fitting which essentially allows you to fit Pingel and other petcock valves onto gas tanks with threaded bungs. Which is something not able to be done without cutting, welding, swearing, etc. The adaptor nut is threaded onto the tank with the fuel valve threaded into the nut and viola! Bingo Bango Baby!
Works just as it should.
used this to replace the tired leaking petcock on my 81 cb750k. no leaks, no drips, no worries. used the 1/4 npt to 1/4 barb petcock from DCC as well. very happy not having gas on my leg.