The component with the lowest price in the PISTON - CRANKSHAFT schematic is the Key.
The twelve T305 Tc305 1969 Usa (e03) Piston - Crankshaft component parts are all listed in this schematic.
A sample from the products for the Piston - Crankshaft include: Key, Bearing(20x26x16.7), Shim(25x40x1), Key.