Parts such as the 025 Front And Rear Wheels: Nut M25x1.25, Rear Wheel, Spring Drive Fixing Bush, Bearing are included in the Mts620 2006 Eu (multistrada 620) 9151-2261c 025 Front And Rear Wheels parts fiche.
The sub assemblies and components that make up this 025 Front And Rear Wheels include this Rear Wheel, the most expensive part.
In this schematic the "Screw M8x20" is used most often.