The most reasonably priced component used on the Gsf1200s Bandit 2004 (k4) Usa (e03) Frame Cover (model K1) is the Washer(6.5x18x1).
In this schematic the "Screw" is used most often.
The Frame Cover (model K1) assembly is constructed from several parts from which the Cover,frame,l(gray) is the most expensive.