In this schematic the "Bolt,knock 7x12" is used most often.
This part-list fiche shows all the components that make up the Xr250 1979 (z) Usa Cam Chain / Tensioner .
A sample from the products for the Cam Chain / Tensioner include: Adjr,tensioner, Tensioner,chain, Bolt,knock 7x12, Bolt,flange,6x28.