The ornamental design for a contoured socket for locking cap, as shown and described.
FIG. 1 is a perspective view of a locking pipe cap showing a socket configured in accordance with a preferred embodiment of the present invention;
FIG. 2 is a front end view of the socket of FIG. 1; and,
FIG. 3 is a partially sectioned side view of the socket of FIG. 1 taken along the line 3--3 in FIG. 2, the side views, the top view and the bottom view of the socket being apparent from FIG. 3 due to the symmetrical nature of the socket.
The elements illustrated in dashed lines in the accompanying drawings are considered environmental and do not form a part of the claimed design. Additionally, the rear face of the socket does not form a part of the claimed design and, therefore, is not illustrated.