I know what you mean, I mean no offense to you, only to MB (Bosch?) engineers

I mean a 22 mm head nut is just a strange device, normally it should be a 21 or a 24 mm, it is like something you put only in case of having a nut and a bolt so you can use one set of wrenches or something.

Unless maybe if it is inch, like a 7/8 head on a 1/2 inch thread...