Parts such as the Chain Case - Shock Absorber: Washer,lock, Absorber Assy,rr Shock, Washer, Nut, Lower Lh are included in the Gs450e 1986 (g) United Kingdom South Africa Belgium (e02 E06 E21 Chain Case - Shock Absorber parts fiche.
The lowest price component in this Chain Case - Shock Absorber parts-list fiche is the Bolt.
In this schematic the "Nut, Lower Lh" is used most often.