Had left rear brakeline relaced by a friend and apparently my FRIEND used the wrong size brakeline nut where it threads in a valve (proportioning valve)over the top of rear-end because its leaking fluid.Any way of knowing what size thread and pitch so I can repair it.I do not have the old one he discarded at parts store apparently.Wish I could have been around while the work was being done but I guess you live and learn.Thx.