The ornamental design for a hinge bolt, as shown and described.
FIG. 1 is a bottom, front, and right side perspective view of a hinge bolt according to my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a right side elevation view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The long-dash short-dash broken lines represent boundaries of the claimed design and form no part of the claimed design. All other broken lines depict portions of the hinge bolt that form no part of the claimed design.