Part of coupler

[0001]FIG. 1 is a bottom, front, right side perspective view of a part of coupler, showing our new design;

[0002]FIG. 2 is a bottom plan view thereof;

[0003]FIG. 3 is a top plan view thereof;

[0004]FIG. 4 is a front view thereof;

[0005]FIG. 5 is a rear view thereof;

[0006]FIG. 6 is a left side view thereof; and,

[0007]FIG. 7 is a right side view thereof.

[0008]Evenly broken lines depict portions of the part of coupler which form no part of the claimed design. The dot-dash 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.