The Bolt-washer, 4x20 is the most widely applied product in the CIVIC 1991 (M) 4DR EX (KA,KL) DISTRIBUTOR ( four times ).
The Bolt-washer, 4x20 is the lowest priced item on this Distributor schematic.
Parts such as the Distributor: Noise Suppressor, Bolt-washer, 4x20, Rotor Head Assy S, Coil Assy Ign are included in the Civic 1991 (m) 4dr Ex (ka,kl) Distributor parts fiche.