Disc-Lock M22 Safety Wheel Nut

Disc-Lock’s M22 Safety Wheel Nut is a three-piece, Class-10 wedge locking wheel nut that helps prevent the loosening of wheels, and ultimately, dangerous wheel-offs due to vibration. They are designed to replace conventional lug nuts on commercial and military vehicles.

How Disc-Lock’s Safety Wheel Nut Works

Commercial vehicles experience more vibration, weight, braking, heat, lateral bending due to cornering, and more acceleration and braking with heavy loads compared to lighter cars and trucks. These factors contribute to the settling and loosening of normal bolted wheel assemblies.

When loosening begins to occur, Disc-Lock’s Safety Wheel Nut uses wedge locking technology to maintain the clamping force as the nut is unable to overcome the wedge and loosen. The interlocking cams of the Safety Wheel Nut create a wedge effect because the cam angles are greater than the thread pitch, securing the joint.

Disc-Lock’s Safety Wheel Nuts are a simple and effective way to help prevent wheel-offs in tractor-trailers, buses, garbage trucks, dump trucks, and military vehicles. They are an inexpensive investment compared to the money saved on expensive litigation if a wheel-off occurred — which the NTSB estimates that around 750 to 1,000 trucks are involved in wheel-off incidents every year.

Of all the vehicles that use a Disc-Lock Wheel Nut, zero wheel-offs have occurred. Read our case study about a school bus fleet that mitigated costly litigation by using Safety Wheel Nuts on their buses.