A sample from the products for the Rear Fork include: Pin,split, 2.0, Oil Seal,20x35x8, R/brg Tap N/com, Holder,rr Fork Be.
In this schematic the "Nut,hex.,10mm" is used most often.
This Rear Fork diagram displays the required parts for the Cx500c Custom 1980 (a) Australia Rear Fork.