The most reasonably priced component used on the G8-ef 1990 Rear Shocks is the Washer(6a1).
Parts such as the Rear Shocks: Nut, Self Locking (1m1), Bolt(2rr), Bush 2, Arm, Rear 1 are included in the G8-ef 1990 Rear Shocks parts fiche.
On this parts fiche the Bolt, Flange(j50) is the most specified component.