We claim the ornamental design of the pintle hook, as shown and described.
FIG. 1 is a perspective view showing a front, top and side of a pintle hook;
FIG. 2 is an elevational view of a left side of the pintle hook;
FIG. 3 is an elevational view of a right side of the second embodiment of the pintle hook;
FIG. 4 is a front elevational view of the second embodiment of the pintle hook;
FIG. 5 is a rear elevational view of the second embodiment of the pintle hook;
FIG. 6 is a top plan view of the second embodiment of the pintle hook; and,
FIG. 7 is a bottom plan view of the second embodiment of the pintle hook.
The dot-dash lines in the figures show the boundary between claimed and unclaimed areas. The broken lines in the figures show portions of the pintle hook which from no part of the claimed design.