ahhh i had this drama.
its a weird metric thread.
ive got one sitting next to me, a fuel rail with assortment of fittings on it to allow me to plug a pipe on.
your best bet is to just go to a hydraulics fitting shop and say "i want to stick a pipe on this".
there looks to be 4 separate fittings to make mine work.....
a thread converter, an adapter looking thing, a right angle bend, and then a barb fitting.
oh and the place i went to didnt have bango that would fit....