A sample from the products for the Cam Chain (model D) include: Cushion,cam Chain Tensioner, O Ring(d:1.9,id:5.7), Spring, Gasket,tensioner Adjuster (mca).
This schematic depicts all components used in the Gsx250es 1982 (z) General Export (e01) Cam Chain (model D) partslist.
On this parts fiche the Screw is the most specified component.