The Pin is the lowest priced item on this Crankcase schematic.
Some items from this specific schematic: Nut, Bolt, Bolt 8x50, Bolt 8x67.
This schematic depicts all components used in the Dr250s 1986 (g) (e01 E04 E15 E18 E21 E22 E24 E39) Crankcase partslist.