The ornamental design for a fifth wheelprotector, as shown and described.
FIG. 1 is a top, front, right side perspective view of a fifth wheel protector showing my new design with straps shown in dashed lines included for illustrating environment and form no part of the claimed design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof, the right side elevational view being a mirror image thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is a cross-sectional view thereof as generally seen along lines 7-7 in FIG. 5.