The Washer-spring,6mm is the cheapest item from this partsfiche.
A sample from the products for the Fenders ('80 A1) include: Washer,6.5x20x1.6, Flap,fender,rr, Washer-spring,6mm, Fender Rear,l.green.
This FENDERS ('80 A1) assembly utilises six Washer,6.5x20x1.6(s) - the highest specified component.