Clutch centernut for Mille.
Posted: Mon Feb 26, 2018 9:52 am
"3463530072 - Mercedes - Benz - M55 X 1,5mm
NUT FOR COUPLING FLANGE 55*1,5 MM"
So you can use a socket to lock the nut.
It says that is for a 67mm but a 65 mm socket fits much better.
I.ve machined it down to 7mm, thickness.
First is a picture of the original nut and then the machined nut.