In this schematic the "Nut, Self Lock 8mm" is used most often.
A sample from the products for the B-2 Exhaust Pipe include: Slncr Comp Exh, 6x12 Bolt Wash, Nut, Self Lock 8mm, Gasket Ex.
twenty-three components are shown in this Civic 3d 1300 1980 4speed B-2 Exhaust Pipe exploded diagram.