14MM is the O.D. of the Threaded End of the Tie Rod and threads of the Tie Rod End by the Castle Nut. This fits most 2015ish and Up models, early models used the 12mm size.

This Rear Diff Axle Seal fit Both HiSun and Odes Rear Diffs that have no locking device.

Make sure to check the Vent Tube for blockage and Add the Vent Boot Air Bag to allow expansion and no water in or oil out.          https://motorcycledoctor.com/product/diff-vent-air-bag-accordion-boot/