I have some of these in the workshop but I dont think its essential travelling for me to go and have a look for one!! I have a 5.5mm o/d cable with a 16mm dia plug on the end. I want to put it through a skin top and loose the regular nut on the fitting and thread it directly into something. What's the smallest size fitting I can poke a 16mm connector through? Will it then wind down far enough to grip a 5.5mm cable? Anybody got one handy? Thanks!