The ornamental design for a socket, as shown and described.
FIG. 1 is a top-perspective view of a socket showing our new design;
FIG. 2 is a bottom-perspective view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a right-side elevation view thereof;
FIG. 6 is a left-side elevation view thereof;
FIG. 7 is a front elevation view thereof;
FIG. 8 is a rear elevation view thereof;
FIG. 9 is a cross-sectional view taken along line 9-9 in FIG. 3; and,
FIG. 10 is a cross-sectional view taken along line 10-10 in FIG. 3.
The broken line showing the anti-slip torque tool in FIGS. 1-10 is included for the purpose of showing environmental structure and form no part of the claimed design.