Dumba$$
In prepping for a long trip I crawled under the RV and saw some screw that had popped through the thermal cover down there, causing the cover to sag in places. The small washers originally installed ...
Forum Discussion
I'm not familiar with well nuts, but looking at the pictures, it looks like it acts like a rivet. As you tighten the screw the end in the tank flares out which would seal the tank from the inside. This would allow it to work even with the brace under the tank.
