Rivet, used to fasten two parts together, which consists of a metal sleeve with a flange on one end and a center stem, which fits into the sleeve. The stem is broadened at the end so that it forces itself against the end of the sleeve. When the sleeve and stem are put into the hole that has been drilled through both pieces, the sleeve flange is even with the outside of the hole. A riveting tool grabs hold of the stem protruding out if the flanged end of the sleeve, while it is holding the sleeve in the hole, and then pulls the stem. The pulling force on the stem creates pressure on the sleeve, causing it to collapse and expand against the surface around the hole. The pieces are held tightly between the flange on one side and the expanded sleeve end on the other. The stem "pops" off, inside the sleeve, during the pulling process.