The Screw Washer 5x20 is the lowest priced item on this Switch/cable schematic.
Parts such as the Switch/cable: Bolt,adpt.,10mm, Stay,choke Cable, Sw Assy,winker, Mirror Comp.l are included in the Cb1300 Super Four 2007 (7) Brazil / St Switch/cable parts fiche.
In this schematic the "Mirror,lock Nut" is used most often.