On this parts fiche the Washer, Plain is the most specified component.
The Bolt (4fl) is the cheapest item from this partsfiche.
Parts such as the Front Master Cylinder: Nut, U (4l0), Diaphragm, Reservoir, Bracket, Master Cylinder, Washer, Plain are included in the Xt660r 2006 5vk6 Finland 1e5vk-300s2 Front Master Cylinder parts fiche.