FASTENER, METHOD OF ATTACHING A FASTENER TO A PANEL AND FASTENER AND PANEL ASSEMBLY.

摘要

A fastener element including a barrel portion, a first radial flange portion integral and coaxially aligned with the barrel portion and a second radial flange portion having a diameter greater than the first radial flange portion coaxially aligned with the first radial flange portion including an annular face having circumferentially spaced radial ribs and a method of installing the fastener element which includes forming an opening in a panel which receives the barrel and first radial flange portions, wherein the panel is deformed radially inwardly against the first radial flange portion and the first radial flange portion is preferably deformed radially outwardly forming a secure fastener and panel assembly.