The most reasonably priced component used on the Sfv650a Gladius 2014 (l4) Usa (e03) Rear Master Cylinder (sfv650l4 E03) is the Pin.
In this schematic the "Washer(10x15x1.5)" is used most often.
Some items from this specific schematic: Screw, Cap, Diaphragm, Pin(6x18.2).