Best advise is get it from a Jayco dealer or and rv dealer, I made several trips to the hardware store and end up getting from the dealer. There should be a number on the female connector, but unless your eyes are good its hard to read.
2011 Jayco Eagle 321RLTS FW
2012 Dodge 3500
US Govt survey shows three out of four people make up 75% of the total population