Simple solution, if it don't fit get a hammer. If it still don't fit get a bigger hammer. Then use it on the head of whoever made the nut. I'm getting set to use a real big hammer myself within the next week or so. Won't bore you with the details. Suffice to say it's spring and around here most of the people who work on boats made their livings working on cars and houses until recently. They can sure talk a good game though, through both sides of their mouths.