In this schematic the "Nut,cap,7mm" is used most often.
Parts such as the Exhaust Muffler: Nut, Flange, 8mm, Pipe Comp Exh, Rub,stand Stopper, Bolt,flange,8x53 are included in the Cb1000f 1993 (p) England / Mkh Exhaust Muffler parts fiche.
The Washer,plain, 8mm is the lowest priced item on this Exhaust Muffler schematic.