The spindle nut also known as the axle nut fastens the hub to the axle and is usually attached with a pin.
Spindle nut significanceThe spindle nut is usually fastened with a pin or axle nut retainer to prevent them from loosening when driving. It has the responsibility of performing the job of retaining the hub connection on the spindle. The spindle nut is vital because it can cause a wobbling effect if it were to loosen while driving. The spindle is composed of the parts, the washer, the snap ring, and a nut that work together to secure a wheel hub onto the spindle.
Common issues with a worn spindle nutA worn spindle nut can lead to the nut not threading back on and you also won't be able to re-use it because it will not have the same torque.