Of all the components that make up this Swingarm / Driveshaft the Nut,hex.,8mm has the lowest price.
On this parts fiche the Nut,hex.,10mm is the most specified component.
Some items from this specific schematic: Pin,split, 2.0, Pin,split, 2.0, Nut,hex.,10mm, Bolt,flange,8x32.