FIG. 1 is a perspective view of the present invention of a fastener,

FIG. 2 is a front view of FIG. 1,

FIG. 3 is a rear view of FIG. 1,

FIG. 4 is a right side view of FIG. 1,

FIG. 5 is a top view of FIG. 1; and,

FIG. 6 is a bottom view of FIG. 1.

The portions in broken lines form no part of the claimed design.