The Nut,hex.,8mm is the lowest priced item on this Rear Fork schematic.
A sample from the products for the Rear Fork include: Washer,plain,8mm, R/brg Tap N/com, R/brg Tap N/com, Pin,split, 2.0.
This REAR FORK assembly utilises three Nut,hex.,10mm(s) - the highest specified component.