http://products.kvt-koenig.us/katalog/katlist.jsp?kat=9&txt=FILKO+BLIND+RIVET+NUTS&gclid =CIjF0vH627MCFSPhQgodpSIApg
Rivnuts are great for creating strong threads on thin wall tubing less than .125" thick. We will use a rivnut if the mating part needs to be removable. Otherwise we would use a pop rivet and join the parts together.
The correct pilot hole must be drilled for the hardware. We tend to stick to #10 nuts. When installing the hardware a manual hand gun can be used. We have a pneumatic gun to install the hardware fast and exact every time. Takes a couple of times to get a hang of using the tool. A incorrectly installed rivnut will spin in the hole not allowing the user to unscrew the hardware.
Here is a youtube of the pneumatic gun
http://www.youtube.com/watch?v=Nv_rA8LNvcc