Chain shackle with pin locking structure

FIG. 1 is a front perspective view of a chain shackle with pin locking structure embodying my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a rear view thereof, the opposite side being a mirror image thereof; and,

FIG. 6 is a left side elevational view thereof.

The broken line showing in FIGS. 1, 2, 4 and 5 are for illustrative purposes only and form no part of the claimed design.