Abstract: An elongated shank member is provided including a first end portion defining an endwise outwardly opening threaded bore therein for threaded engagement over a diametrically reduced threaded shaft end portion. A washer is also provided and is freely slidable on the second end portion of the shank member and the washer is of an outside diameter greater than the outside diameter of the first end portion of the shank member. A nut is provided and removably threadedly engaged on the second end of the shank member and is of size too great to be received through the center opening of the washer. Finally, a sleeve member is provided and is freely slidable on the shank member and abuttable by the washer. The second end portion of the shank member includes diametrically opposite flats and the first end portion of the shank member is of an outside diameter considerably greater than the outside diameter of the second end portion of the shank member.