ENSEMBLE A ORGANE DE FIXATION PERMANENTE DE PANNEAUX

A fastener assembly for permanently securing together a pair of mating panels having aligned apertures therethrough including a bolt having an enlarged head at one end, a threaded shaft portion at the other end and an integral main body portion interconnecting the head and the shaft portion, a split ring bushing encircling the bolt, a first nut threadably mounted on the bolt having deformable protrusions thereon and a second nut threadably mounted on first nut also having first deformable protrusions thereon, both sets of protrusions being deformable at a predetermined load thereon into the threads of the bolt and the first nut respectively, the first nut being forced against the bushing when threaded on the bolt and the second nut abutting against an underside of one of the panels when threaded on the first nut thereby providing a mechanical lock between the deformed protrusions and the mating threads permanently locking the panels together. In a second embodiment, a first nut is mounted inside of a second nut, the latter being threaded onto the bolt and the first nut abutting against the bushing.