A sample from the products for the Rear Master Cylinder (model M/n) include: Screw(6x16), Cap, Nut, Yoke.
With four applications this Washer(10x15x1.5) is the most specified part.
The most reasonably priced component used on the Gsf400 Bandit 1993 (p) Usa California (e03 E33) Rear Master Cylinder (model M/n) is the Pin.