LOOOOL!!!!!!
I know *exactly*what you mean. There is no widely used cro word for hosebarb, so first it involved lots of other words and wriggly movements of hand trying to explain, so I bought one cheap pvc ordinary pipe fitting and carried it around with me, and asking for something like this, but metal, with threaded end, and ofcourse, bigger ID...Gained much more success judging the faces of the people working in shops, but the answers were all the same - sorry, no...and You won't find it, go to the machine shop, have them make some for you...
Yeah, different countries, same problems