The most reasonably priced component used on the Gx240u1\vta2\14z5f602 Piston is the Clip Piston Pin 1.
A sample from the products for the Piston include: Ring Set Piston(o, Clip Piston Pin 1, Piston (0.25), Piston (0.75).
On this parts fiche the Bolt,connecting R is the most specified component.