Fastener

[0001]FIG. 1 is a left side elevational view of a fastener, showing my new design;

[0002]FIG. 2 is a front elevational view thereof;

[0003]FIG. 3 is a perspective view thereof;

[0004]FIG. 4 is a right side elevational view thereof;

[0005]FIG. 5 is bottom plan view thereof; and,

[0006]FIG. 6 is a top plan view thereof.

[0007]Broken lines show portions of the fastener that form no part of the claimed design.