I am swapping in an 2.5 oil filter housing and want to hook-up the banjo bolt for the pressure gauge from a series. Unfortunately the housing is a 10mm bolt an the bolt is a 3/8", but I don't know the pitch. Its not a normal pitch count. Anyone know if its an NPT or something else? I going to helicoil the hole, to match the bolt but dont know the pitch needed.
Jared