The ornamental design for a fastener for sight, as shown and described.
FIG. 1 is a perspective top view of my new fastener for sight;
FIG. 2 is an end view of my new fastener for sight of FIG. 1;
FIG. 3 is a side elevational view of my new fastener for sight;
FIG. 4 is a side elevational view of my new fastener for sight from the side opposite that of FIG. 3;
FIG. 5 is an end view of my new fastener for sight from the end opposite that of FIG. 2;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken line showing of the pattern of concentric circles that recede in size in FIG. 2, the small raised feature that has tapered sides and a flat top of FIGS. 3, 6 and 7, and the central circular opening illustrated by two concentric circles of FIG. 3 is for the purpose of illustrating environmental structure and forms no part of the claimed design.