*Threads on the outside of the outside of the tank.
*Sediment bowl will keep petcock from clogging and helps it run better. Its used to keep fuel clean.
*Be sure to check that the feeding outlet matches so there will be no fitting problems for perfect performance!
Thread Size:M16 X 1.5MM (Thread Size about 5/8 in, Thread Pitch about 1/16 in) Hex Nut/Cap Size:22 MM (about 7/8 in) Diameter of Fuel Outlet Pipe:M6 MM (about 15/64 in)