The Nut,12mm is the lowest priced item on this Rear Suspension/shock Absorber ( schematic.
A sample from the products for the Rear Suspension/shock Absorber ( include: Bushing,14x27.5x17, Boot,ball Joint, Washer-plain-small,14, Bolt,14x60.
The most expensive part in this assembly is the Shockabsorber,rr.