The twenty-one Lt80 Quad Sport 2006 (k6) Usa (e03) Quadsport Quad-sport Knuckle Arm component parts are all listed in this schematic.
The Pin 20x20 is the lowest priced item on this Knuckle Arm schematic.
A sample from the products for the Knuckle Arm include: Nut, Bolt,knuckle Arm, Pin 20x20, Nut.