Screw Fastener

FIG. 1 is an elevated perspective view of the screw fastener of our claimed design; FIG. 2 is a front view of the screw fastener of FIG. 1 ; FIG. 3 is a back view of the screw fastener of FIG. 1 ; FIG. 4 is a left side view of the screw fastener of FIG. 1 ; FIG. 5 is a right side view of the screw fastener of FIG. 1 ; FIG. 6 is a top view of the screw fastener of FIG. 1 ; and, FIG. 7 is a bottom view of the screw fastener of FIG. 1 .