The most reasonably priced component used on the Nsr125r 1992 (n) Switzerland / Kph Front Brake Master Cylinder is the Screw Wash.,4x12.
Some items from this specific schematic: Sw Assy,fr Stop, Screw,flat,4x12, Cylinder Assy.,fr, Oil Bolt,10x22.
In this schematic the "Washer Oil Bolt" is used most often.