This nut is used for fastening the starter motor on Citroën 11CV and 15CV models. It has metric M12x1.50 thread and fits the matching starter housing. The nut provides a secure connection between starter motor and engine block. The design matches the dimensions and load conditions at this mounting point. The material is suitable for the mechanical forces that occur during engine starting. The nut can be used as a replacement during service or repair of the original starter motor mounting. It supports correct alignment and clamping force of the starter assembly on the engine.

