Of all the components that make up this Crankshaft. Piston the Bolt, With Washer has the lowest price.
A sample from the products for the Crankshaft. Piston include: Oil Seal (6e5), Piston Ring Set (0.25mm O/s), Piston Ring Set (0.25mm O/s), Piston Ring Set (0.50mm O/s).
In this schematic the "Clip, Piston Pin" is used most often.