There are currently 2 names in this directory beginning with the letter K.
King pin is a type of steering knuckle pivot. This system shares the same job as a typical ball joint but is believed to be stronger than the ball joint. This system has basically been phased out by ball joints.
The steering knuckle is the main component that allows a solid axle to perform its steering function. The knuckle is usually retained to the housing by the ball joints or king pins.