In this schematic the "Washer,oil Bolt" is used most often.
Check out any of the twenty-four Rear Brake Master Cylinder components enlisted.
Parts such as the Rear Brake Master Cylinder: Joint,brake Rod, Bolt,flange,6x20, Bolt,oil,10x22, Washer,oil Bolt are included in the Cbr600f Hurricane 1987 (h) Germany / Kph Rear Brake Master Cylinder parts fiche.