The ornamental design for an apparatus for correcting hammer toe, as shown and described.
FIG. 1 is an exploded front perspective view of the parts of an apparatus for correcting hammer toe, including a first element for forming a male member of a joint and a second element for forming a female member of the joint, according to our new design;
FIG. 2 is an exploded front view thereof;
FIG. 3 is an exploded back view thereof;
FIG. 4 is an exploded right side view thereof; and,
FIG. 5 is an exploded left side view thereof.
In the drawings, the broken lines are for the purpose of illustrating environment only, and form no part of the claimed design.