I claim the ornamental design for a seat for socket, as shown and described.
FIG. 1 is a top, front, right perspective view of a seat for socket showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is an embodiment showing the seat for socket in use; and,
FIG. 9 is an exploded view of FIG. 8.
The broken lines shown are included for the purpose of illustrating portions of the seat for socket that form no part of the claim. The broken lines in FIGS. 8 and 9 are for the purpose of illustrating environmental structure of the seat for socket, the broken lines form no part of the claimed design.