The ornamental design for a mount socket for use in vehicle dash mounted equipment, as shown and described.
FIG. 1 is a perspective view of a mount socket for use in vehicle dash mounted equipment showing my new design;
FIG. 2 is a front perspective view thereof;
FIG. 3 is an oblique side perspective view thereof showing the mount in an engaged position; and,
FIG. 4 is a rear view thereof.
The broken lines showing the device in which the mount is disposed is for the purpose of illustrating an environment in which the mount is used and forms no part of the claimed design.