Parts such as the Seat - Rear Cowl: Washer, Screw 4x8, Catch Assy,l Seat, Stay,r Seat Set, Screw,cross 5x8 are included in the Ns400r 1985 (f) South Africa Seat - Rear Cowl parts fiche.
The Honda SEAT - REAR COWL has thirty products enlisted in the schematic.
With six applications this Nut,flange,6mm is the most specified part.