On this parts fiche the Washer,oil Bolt is the most specified component.
A sample from the products for the Fr. Brake Master Cylinder (xl600vm/vn/vp) include: Guard,r.k*nh-138*, Collar,winkerstay, Nut,flange,6mm, Washer,oil Bolt.
The Fr. Brake Master Cylinder (xl600vm/vn/vp) assembly is constructed from several parts from which the Cylinder A*nh138* is the most expensive.