Sherex's High Strength Hex Body Rivet Closed End unified threaded rivet nuts are made for appliations that use Grade 8 hardware or in high clamp load environments. Closed end rivet nuts help prevent dust and liquid from entering through the threads. 

These off-the-shelf rivet nuts are available in sizes #10-24 through 1/2"-20, and can be installed using standard rivet nut tooling.