The ornamental design for a cap for a wedgeblock, as shown and described.
FIG. 1 is a first perspective view of a cap for a wedge block that may be used as part of a pipe support system, showing my new design.
FIG. 2 is a second perspective view of the cap for a wedge block of FIG. 1.
FIG. 3 is a top plan view thereof.
FIG. 4 is a bottom plan view thereof.
FIG. 5 is a front plan view thereof.
FIG. 6 is a rear plan view thereof.
FIG. 7 is a right side elevation view thereof.
FIG. 8 is a left side elevation view thereof; and,
FIG. 9 is a perspective view of the cap for a wedge block of FIG. 1 residing on a wedge block.
The broken lines in FIG. 4 illustrate portions of the cap for a wedge block that form no part of the claimed design. The broken lines in FIG. 9 depict environmental subject matter that forms no part of the claimed design.