This Left Side Cover - Rectifier - Fuse diagram displays the required parts for the Cb400nc 1983 (d) European Direct Sales Left Side Cover - Rectifier - Fuse.
The component with the lowest price in the LEFT SIDE COVER - RECTIFIER - FUSE schematic is the Bolt-wash,6x20.
With three applications this Bolt,flange 6x14 is the most specified part.