The Nut,hex 10mm is the cheapest item from this partsfiche.
In this schematic the "Spring,fr Fork" is used most often.
Parts such as the Front Fork: Collar,spring, O Ring 39.7x2.4, Bush,guide, Pipe,r Slide are included in the Cb600fa Hornet 2009 (9) France / Abs Cmf 25k Front Fork parts fiche.