Of all the components used in this assembly the Sub Assy,rear M/c is the most expensive.
On this parts fiche the Washer,oil Bolt is the most specified component.
A sample from the products for the Rr. Brake Master Cylinder (cb1300a/cb1300sa) include: Cup Comp.,oil (ni, Circlip, Piston Set,m/c, Clamper,master Cy.