Originally Posted by surfpod
That could be it. The head on mine is 5/8 inch, same as in the rivet you linked. In my trailer, the rivets are not located on a rib.
Looking again at my trailer, I see that the small overhead cabinet on the street side in the bedroom has only three screws holding the top mounting rail to the ceiling, and no rivets. Doesn't look all that secure, but since that cabinet is rather small and used for light stuff (clothing), I guess I shouldn't worry about it.
The large cabinets on the end have no visible fasteners. I don't know how they are attached or how one would reinforce their mounting.