Part of Coupler

FIG. 1 is a bottom, front, right side perspective view of a part of coupler, showing the new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a right side view thereof.

Thin evenly broken lines depict portions of the part of coupler which form no part of the claimed design. The thick broken line is an invisible boundary line where claimed surfaces of the part of coupler adjoin unclaimed surfaces of the part of coupler; the boundary line itself forms no part of the claimed design.