Check out any of the twenty-seven Rear Hub/brake/chain components enlisted.
Parts such as the Rear Hub/brake/chain: Joint-chain,ek428-g, Nut-hex-fine, Collar,l=85, Bearing-ball,#6301zc3 are included in the Kd100-m4 1979 Canada Rear Hub/brake/chain parts fiche.
The Washer-plain,12mm is the lowest priced item on this Rear Hub/brake/chain schematic.