The ornamental design for a bonnet for tractor, as shown and described.
FIG. 1 is a top perspective view of a bonnet for tractor showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a left side view thereof;
FIG. 7 is a right side view thereof; and,
FIG. 8 is a reference view of the bonnet for tractor showing our new design in an environment in which it may be used, the broken lines forming no part of the claimed design.
The gray shading in the Figures shows outside air inlets and not surface ornamentation.
The shade lines in the Figures show contour and not surface ornamentation.
The oblique shade lines in the Figures show transparency or translucency.
The broken lines in the Figures show portions of the bonnet for tractor that form no part of the claimed design.