The Stud Bolt (l:40) is the lowest priced item on this Cylinder (model X) schematic.
Parts such as the Cylinder (model X): Stud Bolt, Head,cylinder, Bolt, Filter,exh Valve Breather Hose are included in the Rm250 1999 (x) Usa (e03) Cylinder (model X) parts fiche.
In this schematic the "Nut" is used most often.