Parts such as the Right Handle Switch (model Z): Washer, Lock Washer, Grip,throttle, Contact,switch are included in the Gs650e 1982 (z) Usa (e03) Right Handle Switch (model Z) parts fiche.
The Screw is the cheapest item from this partsfiche.
The fourteen Gs650e 1982 (z) Usa (e03) Right Handle Switch (model Z) component parts are all listed in this schematic.