Disc-Lock Safety Wheel Nuts

Considered far superior int terms of safety than standard two-piece wheel nuts


Why choose disc-lock?

  • A vibration proof wheel nut, specifically designed to prevent wheel loss from commercial vehicles such as trucks, trailers and buses.

  • The shock and vibration which cause standard wheel nuts to come loose, cause Disc-Lock Safety Wheel Nuts to lock, thus maintaining the clamp load and keeping the wheel on the axle. 




The nut has been strengthened considerably to overcome the problems caused by air-gun abuse. Though it should be noted that while the Disc-Lock Safety Wheel Nut can now withstand such abuse, the same cannot be said of the stud. This could experience untold damage in particular stretching of the stud if the wheel nut is severely over torqued.


Better Socket Engagement

The height of the middle hexagon-flanged washer (see left) has been increased to give better socket engagement.



The Disc-Lock Safety Wheel Nut is now coated with a new, environmentally-friendly, anti-corrosion protection, GEOMET ® which is chrome free, ensuring it is compliant with European Union Directive 2002/85/EC (Restriction of Hazardous Substances). This new coating has passed a 720 hours salt spray test.


How it 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.



Simply follow the same procedure as for conventional nuts and torque to normal specifications. 



Find out more about sizes, width, height and flange diameter of Disc-Lock Lock Nuts.

Learn More >


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(07) 3870 5817

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