Patent ID: 8511956

Claim:
A fastener used for fastening at least two components together, the fastener comprising: a bolt comprising a head, a shaft extending down from the head, an engaging portion extending from the shaft, and a threaded portion extending down from the engaging portion, a diameter of the engaging portion being larger than a diameter of the shaft and larger than a diameter of the threaded portion; a shell comprising a cylindrical side wall and a collar extending inwardly from a bottom of the side wall, the collar defining a through hole therein, a diameter of the through hole being slightly smaller than the diameter of the engaging portion of the bolt; a projection extending down from the collar and receiving the engaging portion of the bolt therein, a plurality of axial splits being defined in the projection and spanning through both the projection and the collar; and an elastic member placed around the shaft and sandwiched between the head of the bolt and the collar of the shell; wherein the bolt with the elastic member is received in the shell, with a top rim of the engaging portion of the bolt abutting against a bottom of the collar of the shell, and the engaging portion is forced to extend through the through hole of the collar with expanding the collar radially and outwardly.