does any one know the size of the rubber o ring for the brass screw seems vw only sell the brass screw its self
if you can get a screw from VW it will come with the seal, but probably all NLA by now. I just got a big box of orings and used the closest match
I did the same thing. Bought a huge box of o-rings. None of them were quite right so put a couple of wraps of ptfe around the screw and then used the best fitting o-ring from the box.
