The Screw, Pan Head (5y1) is the lowest priced item on this Crankcase Cover 1 schematic.
Parts such as the Crankcase Cover 1: Plug, Oil, Plug, Straight Screw (5h0), Gasket, Crankcase Cover 2 (nas), O-ring (2h9) are included in the Xv125 1997 5aj2 Spain 275aj-352s1 Crankcase Cover 1 parts fiche.
On this parts fiche the Screw, Pan Head(3dn) is the most specified component.