The most reasonably priced component used on the Ds80 1994 (r) Usa (e03) Fuel Cock is the O Ring.
A sample from the products for the Fuel Cock include: Screw, Cock Assy,fuel, Washer,lock, O Ring.
ten components are shown in this Ds80 1994 (r) Usa (e03) Fuel Cock exploded diagram.