Parts such as the Front Fender: Washer,4mm, Bolt,hex., 6x16, Grommt,wire, Rubber,cushion are included in the Cb250k4 France Front Fender parts fiche.
Of all the components that make up this Front Fender the Bolt,hex., 6x16 has the lowest price.
In this schematic the "Rubber,cushion" is used most often.