wheel bearing nut, MB-GPW req 8 per vehicle, A866
use special socket tool to remove (item A692)
Dana Axles Model 23, 25, 27, require 2ea at each wheel
and 1ea A865 keyed washer and 1ea A867 bender washer
Dana Model 41, 44 use wheel bearing nut 636344
installation video
https://youtu.be/tmPPvPAGzCg