The Washer-spring,6mm is the lowest priced item on this Front Fender schematic.
Parts such as the Front Fender: Damper, Damper Rubber, Front Fender,candytone Blue, Fender,front are included in the Ke100-a6 Ke100 1977 Canada Front Fender parts fiche.
On this parts fiche the Collar is the most specified component.