The Lock Washer is the lowest priced item on this Electrical schematic.
Parts such as the Electrical: Screw 6x12, Screw, Box Assembly,fuse, Screw(6x10) are included in the A100-4 1978 (c) General Export (e01) Electrical parts fiche.
The Electrical assembly is constructed from several parts from which the Switch Assembly,ignition is the most expensive.