Parts such as the Generator: Screw, Pan Head (713), Washer, Plate (26h), Rotor Assy, Nut, Crank Shaft (650) are included in the 6p 1991 Generator parts fiche.
In this schematic the "Ybs67-5 Washer, Spring" is used most often.
This part-list fiche shows all the components that make up the 6p 1991 Generator .