I’m in the process of building a Randall for my kegerator out of a stainless steal filter canister I have. The issue I’m having is that I can’t find what the size of the standard hex nut is that gets screwed into the keg coupler. I need to find the male equivalent to attach to the actual randall. I’ve looked on several websites, but none of the hex nut descriptions actually give the specs of the nut. Can anyone help? (the nut I’m talking about http://www.kegworks.com/connectors-for-beer-lines-394-p16540)