Washer for sidecar 2WD splined sleeve

This is a protective washer that installs between the splined sleeve and the bearing on the sidecar driveshaft. Generally speaking you can probably reuse your old one.

This should only come up when you're replacing the two big axle bearings for the sidecar shaft  on a 2WD Ural. Those bearings do like to get water in them and get crunchy.

(Fun fact: the wheel bearings in the sidecar wheel itself aren't actually used for helping anything roll, so even if those ones get rusty it should never matter.)