The Screw, Pan Head(3xp) is the lowest priced item on this Oil Pump schematic.
In this schematic the "Screw, Pan Head(3xp)" is used most often.
Parts such as the Oil Pump: Pin,dowel (137), Washer, Plain(735), Spring, Compression (3y1), Element Assy, Oil Cleaner are included in the Xt250 Dual Purpose 1983 (d) Usa Oil Pump parts fiche.