I ordered the lock rings and the gaskets.

This was in 2015. I remember encountering the lock rings for the first time.
The tangs on the lock rings broke when removing them. I had no idea where
to get new ones. So I used lock washers. Which we now know that they did not
do a good job of replacing the lock rings.

Back then I thought that the threads on the original bolts appeared to be
abnormally sharp at the time.
Jeffrey