Parts such as the Tail Lamp (g6sb-g7s): Washer(6a1), Grommet 839774310000, Gasket,tail Lamp (nas), Bracket, License are included in the G6s 1970-1972 Tail Lamp (g6sb-g7s) parts fiche.
The Bolt(2jg) is the cheapest item from this partsfiche.
On this parts fiche the Screw, Pan Head (5a8) is the most specified component.