The Screw-washer,5x20 is the lowest priced item on this F-2 Handle Switch - Lever - Cable schematic.
With two applications this Screw-washer,5x20 is the most specified part.
A sample from the products for the F-2 Handle Switch - Lever - Cable include: Nut,hex 6mm, Cable Comp.,choke, Pipe,throt.grip, Cable,fr.brake.