Abstract: An easily insertable fastener for use joining a plurality of layers of material, and particularly as the pin for an eyeglass temple hinge. This fastener has a shank member to pass through apertures of the layers and extend outward from a far side. A plurality of sets of fingers extend from the shank member along the length thereof, with a recess provided immediately adjacent each set of fingers whereby the fingers, when distorted, are fully received in the recess as the fastener is inserted. The recess depth corresponds to the thickness of the adjacent fingers. When the fastener is fully in place, at least one of the sets of fingers projects from the opposite side of the layers such that the projecting set of fingers returns to the extended position to prevent removal of the fastener. Several embodiments are shown and described for use as eyeglass temple hings fasteners where all of the apertures of the hinge barrels are of the same size, as well as when an outer barrel is smaller and/or is threaded.