A sample from the products for the Crankshaft include: Ring Set,piston, Pin,piston, Crankshaft Set, Metal,crank Pin.
In this schematic the "Nut" is used most often.
The most reasonably priced component used on the Vl1500 Boulevard C90 2006 (k6) Usa (e03) Crankshaft is the Circlip.