Rivet nuts are a great invention and are an immense aid in upfitting a van. They are inserted into a hole in the sheet metal of the van, and, using an inexpensive tool, they convert the hole into a captive nut. I used them to attach the ceiling panels to the roof bows, to construct a 'containment' wall to keep everything in its place when we were hauling dozens of crates of stuff from Nine of Cups to Las Vegas, and I'll use a lot more when we begin mounting wall panels, cabinets, and Murphy beds to the interior of Blue. Here's how I install them.