The Spring, Compression (3y1) is the lowest priced item on this Oil Pump schematic.
A sample from the products for the Oil Pump include: O-ring (706), Pipe, Oil 1, Spring, Compression (3y1), Circlip.
With a quantity of two pieces, the Screw, Flat Fillister(22f) is the most used part in the OIL PUMP diagram.