So it turns out a Chrysler fuel line fitting is the same. I took the blue clip out of the Chrysler part popped it into the Nissan housing which was still attached to the fuel line and Walla it was fixed. I got the piece at my local Napa. It comes in two sizes 5/16" and 3/8". I believe it was the 5/16" that fit. $10.00 roughly.
Thanks to everyone that replied for your help. Good to know Ayles. My Xterra has been great. 238,000 miles nary an issue in ten years. Until this year maintenance has less than $500.00 annually. The fuel temperature sender went bad which caused the check engine light to go on so I could not get the vehicle inspected. As I was waiting for the sender unit to arrive the Xterra developed a multi cylinder miss fire in bank one. Turns out one of the Cats went bad. I bought all four catalytic converters and four O2 sensors. About $600.00 plus the sender unit for $60.00and the clip $10.00. On the other hand my Jeep spends more time at the dealership than it does in my garage. The good thing is since it is always broken the mileage stays low.