The ornamental design for a socket, as shown and described.
FIG. 1 is a top perspective view of a socket;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a rear view of FIG. 1;
FIG. 4 is a left side view of FIG. 1;
FIG. 5 is a right side view of FIG. 1;
FIG. 6 is a top view of FIG. 1;
FIG. 7 is a bottom view of FIG. 1;
FIG. 8 is a bottom perspective view of the socket of FIG. 1; and,
FIG. 9 is a sectional view taken along line A-A of FIG. 1.
The broken lines shown on the drawings are included for the purpose of illustrating unclaimed features of the wrench and form no part of the claimed design. The dot-dash-dot line shown in FIG. 9 represents the bounds of the claimed design.