The ornamental design for a socket, as shown and described.
FIG. 1 is top side perspective view of my new design for a socket;
FIG. 2 is a bottom side perspective view thereof;
FIG. 3 is front side view thereof; the back side view being a mirror image thereof;
FIG. 4 is a right side view thereof, the left side view being a mirror image thereof;
FIG. 5 is a top side view thereof;
FIG. 6 is a bottom side view thereof; and,
FIG. 7 is a top side perspective view thereof showing the utilization of the socket.
The broken lines shown on the design depict portions of the socket that forms no part of the claimed design. The broken lines not a part of the design shown in FIG. 7 depict environmental subject matter only and likewise form no part of the claimed design.