Parts such as the Generator: Screw, Pan Head, Washer,spring, Stator Assy, Washer, Plain (646) are included in the Xt350'88 1988 55v0 Holland 1855v-300e1 Generator parts fiche.
The Screw, Pan Head is the lowest priced item on this Generator schematic.
In this schematic the "Screw, Pan Head" is used most often.