On this parts fiche the Bolt Stud 6x32 is the most specified component.
The Cylinder/cylinder Head assembly is constructed from several parts from which the Head Comp.,cyln. is the most expensive.
Parts such as the Cylinder/cylinder Head: O Ring 9.0x1.6, Bolt Stud 6x32, Gasket,cylinder (nas), Gasket,rubber 9mm are included in the St50 Dax 1989 (k) England Cylinder/cylinder Head parts fiche.