Fastener

Claim 1

A unitary fastener for connecting together parts of varying thickness having aligned apertures, comprising a resilient substantially bowed head and a generally V-shaped shank defined by a pair of legs integrally resiliently connected together at the apex of the V shape with the upper end of one of the legs integral with the concave side of the bowed head generally centrally thereof and with the other leg being a free leg and with the V-shaped shank projectable apex-end-first through the aligned apertures of the parts to be connected, said free leg extending from the apex of the V shape toward the concave side of the head and terminating in a free end portion disposed closely thereadjacent, a single pair of catch shoulders on the lateral exterior of the legs facing the concave side of the bowed head and spaced from the central portion thereof a distance sufficient to accommodate the maximum combined thickness of the parts to be connected, said catch shoulders lying in a plane extending transversely of the shank and disposed closely adjacent the free marginal edges of said bowed head, said free end portion of the free leg comprising a resilient extension projecting from the catch shoulder of such leg toward the bowed head and lying substantially completely within the concavity of the head, one of said legs adjacent the bowed head and within the concavity thereof having a stop opposing the other leg to normally limit movement of the legs toward each other, and said resilient extension being bendable between said stop and the catch portion of the free leg to allow squeezing of the free leg toward the other leg beyond the normal limit imposed by said stop during insertion of the shank through the apertures of the parts to be connected to dispose the catch shoulders on the opposite sides of the parts from the bowed head.