New style 140MM hub wear ring.
As of axle 10 9046666, Up to axle 10 I017651.
Picked up surplus from the U.S. Government, priced 20% of the cost of new. This is for the later generation axle that uses a lock ring to secure the sidegear to the bearing, instead of the bolt and nut. These are applicable to all SEE - FLU419 Unimogs.
At these prices, it makes sense to replace your existing wear ring if they are showing any grooves whatsoever from the seal.