In this schematic the "Washer (4.3x13x0.80)" is used most often.
Parts such as the Trip Meter (model T): Nut 6mm, Washer (4.3x13x0.80), Cushion, Cable Assy,speedometer are included in the Rmx250 1990 (l) Usa (e03) Trip Meter (model T) parts fiche.
The most expensive part in this assembly is the Trip Meter.