The ornamental design for a socket, as shown and described.
FIG. 1 is a front view of a socket showing our new design;
FIG. 2 is a rear view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a front perspective view thereof;
FIG. 8 is an enlarged view of the portion labeled “FIG. 8” shown in FIG. 5; and,
FIG. 9 is an enlarged view of the portion labeled “FIG. 9” shown in FIG. 5.
The broken lines show portions of the socket that form no part of the claimed design. The shading lines shown in the drawings represent the approximate three-dimensional contour of the design and are not intended to indicate surface decoration.