Rivet nut

There are two types: one is designed to form a bulge on the back side of the panel as a screw is tightened in its threads.

[2][3] The first rivet nut was created by BF Goodrich in the 1930s, and sold under the trademark RIVNUT®.

It was first used to mount rubber de-icing boots to aircraft wings.

[4] In the field of aviation, rivet nuts are often used to attach various items, such as static dischargers and inspection access covers, to the surface of an aircraft.

[citation needed] Rivet nuts are an ideal replacement for weld nuts because they will not distort base materials, eliminate weld splatter, toxic fumes, and other by-products of the welding process, and can be installed in many different kinds of material including steel, plastic, composites, and fiberglass.

Typical rivet nut
Sectional view
Sectional view, with bolt inserted