Parts such as the Rear Fender: Screw, Reinforcement,rear Fender, Cushion, Spacer (8.2x12x7.5) are included in the Gs650g 1983 (d) Usa (e03) Rear Fender parts fiche.
Check out any of the twenty Rear Fender components enlisted.
The Screw is the cheapest item from this partsfiche.