Parts such as the Bastidor: Bolt With Washer, Bolt, Washer Based(2rh), Bolt, Flange (497), Coil Support are included in the Tzr125 1988 3fn Italy 283fn-354s2 Bastidor parts fiche.
With four applications this Nut, Self-locking(1ag) is the most specified part.
The component with the lowest price in the BASTIDOR schematic is the Bolt, Flange (497).