How The disc-lock safety wheel nut Works
Unlike a standard two-piece wheel nut, the Disc-Lock Safety Wheel Nut is split into three sections, comprising a nut (1), a hexagon-flanged washer (2) and a flat faced cup washer (3). These sections are joined together to form a one-piece assembly with an O/ring.
The top two sections (1 & 2) have interlocking cams. When subjected to road shock or vibration the most common causes of wheel nut loosening, the interlocking cams of the Disc-Lock Safety Wheel Nut attempt to rise against each other.
As the angle of the cam is greater than the pitch angle of the thread on the stud, a wedging action takes place and the Disc-Lock Safety Wheel Nut locks and will not come loose, thus maintaining the clamp load and keeping the wheel on the axle.