In this schematic the "Washer, Lock" is used most often.
The most expensive part in this assembly is the Base,contact Brk..
Parts such as the Points / Spark Advancer: Washer Setting, Oil-seal,15x25x7, Screw,cross 5x20, Breaker,contact are included in the Cl100s Scrambler 1971 K0 Usa Points / Spark Advancer parts fiche.