Yea, ZHCK-G is a 5mm connection. Does anybody know where we can get the RH threaded quick connect for gas line? I don't want to cut my wp20 with "standard" RH B size fitting to make it fit my Everlast welder.Arczone has one that looks right for the gas line but it IS NOT. QD is too small (P/N ZHCK-G won't work).