I am looking to identify a component on a technical drawing

Hello

As part of a technological analysis of a heavy goods vehicle transmission, I seek to identify an element on an assembly drawing.

This element makes it possible to "  hold in position" of several parts and to carry out the preload required for the installation of tapered roller bearings. Here it is an "O" montage. See attached:

Do you know the name of this element? ( For me it's not a traditional notched nut, maybe a nut and a notched counter nut ??   The S shape of the notched washer disturbs me :)

Thank you in advance, Sincerely,

Louis


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Hello

It looks like a safety puck like that

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