The seventeen Jt1200-d6f Jetski Stx-12f 2006 Usa Cylinder Head Cover component parts are all listed in this schematic.
On this parts fiche the Ring-o,head Cover Bol is the most specified component.
The most reasonably priced component used on the Jt1200-d6f Jetski Stx-12f 2006 Usa Cylinder Head Cover is the Bolt,6x10.