The Bolt,flange,nshf, is the lowest priced item on this Left Crankcase Cover schematic.
A sample from the products for the Left Crankcase Cover include: O-ring,13.8x2.5, O-ring,30mm, Cap,l Cover, Bolt Special,6x17.
The sixteen Cb1300 2008 (8) Australia Left Crankcase Cover component parts are all listed in this schematic.