The Bolt,hex 8x100 is the most widely applied product in the CB500K2 FOUR 1973 USA LOWER CASE (BOLT, WASHER) ( ten times ).
The ten Cb500k2 Four 1973 Usa Lower Case (bolt, Washer) component parts are all listed in this schematic.
The component with the lowest price in the LOWER CASE (BOLT, WASHER) schematic is the Bolt,flange, 6x32.
