The Washer is the lowest priced item on this Rear Wheel (rm85lk5/lk6) schematic.
A sample from the products for the Rear Wheel (rm85lk5/lk6) include: Spacer,rr Hub Bearing, Spacer,rr Axle, Sprocket,rr(49t), Tire,rr(90/100 16 52m D737).
With four applications this Screw is the most specified part.