The ornamental design for a valvestemcap, as shown and described.
FIG. 1 is a perspective view from above of a valve stem cap in a pneumatic tire environment showing my new design.
FIG. 2 is a perspective view from below of a valve stem cap showing my new design.
FIG. 3 is a top view of the valve stem cap of FIG. 2.
FIG. 4 is a front/side view of the valve stem cap of FIG. 2; a rear view of the valve stem cap of FIG. 2 is the mirror image of FIG. 4, and an opposite side view of the valve stem cap of FIG. 2 is the mirror image of FIG. 4; and,
FIG. 5 is a bottom view of the of the valve stem cap of FIG. 2.
The broken line showing of the tire valve stem is included for the purpose of illustrating environment and forms no part of the claimed design.