Pin retention design for a track chain

A pin retention device comprising:

• a fastener defining a longitudinal axis, a first end and a second end along the longitudinal axis, a head at the first end and a threaded portion at the second end;
• a tubular spacer defining a length and a thru-hole configured to receive the fastener;
• a nut defining a threaded hole configured to mate with the threaded portion of the fastener;
• the fastener including a shank portion disposed between the head and the threaded portion;
• a washer disposed between the head and the tubular spacer, wherein the washer defines a central aperture that is configured to receive the fastener;
• the pin retention device defining inserted into a pin retention device bore of a track chain member;
• wherein the pin retention device bore defines a longitudinal axis and a thru-depth;
• wherein the length of the tubular spacer exceeds the thru-depth of the pin retention device bore such that the pin retention device is free to float within the pin retention device bore along a longitudinal axis of the pin retention device;
• and
• wherein the longitudinal axis of the pin retention device forms an oblique angle to a direction of travel of the track chain member.