With two applications this Bolt(6x20) is the most specified part.
Some items from this specific schematic: Clip, Gasket(6.4x11.5x0.8) (nas), Hose(7x12x600), Cock Assy,fuel.
This part-list fiche shows all the components that make up the Gz250 Marauder 1999 (x) Usa (e03) Fuel Cock .