Rivet Nuts, usually known by their trade name RivNut™, are inserts rather than rivets, since their purpose is not to clamp two pieces of material together, but to provide a threaded nut in a thin piece of metal which might be too thin to tap a thread into.
Rivet Nuts Diameters
Rivet Nuts are available on the FCH Network with Imperial/US diameters that range from #0 to 6 and with Metric diameters that range from M2 to M60.
Rivet Nuts Lengths
Rivet Nuts are available on the FCH Network with lengths that range from 3/16 to 17.