What is the Disc-Lock HRD Loc-Nut?

The Disc-Lock HRD Loc-Nut is a two-piece lock nut that is specifically designed for use with metric preloaded Tension Control Bolts.

These Property Class 10 nuts and hardened washers are a direct replacement for HRD style nuts and eliminate the risk of preloaded bolts loosening in situations where severe vibration regularly occurs or an increase in dynamic load takes place.

The unique Disc-Lock locking mechanism can be used in challenging applications and environments to ensure the fastening system is safe and secure, enabling complete confidence in each nut that is installed.

Key features:

Disc-Lock HRD Lock Nut

  • Property Class 10 nut

  • Hardened washer

  • Two-piece assembly

  • Easy to install using a TCB Shear Wrench

  • Coated with Greenkote®

  • Ideal for severe vibration applications

  • Available in M12x1.75, M16x2.0 and M20x2.5 sizes.

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To request a quote or for more information about our products, please contact us.


Further technical information on the Disc-Lock HRD Loc-Nut can be found below.

Data Sheet

A Selection of Customers

Greenkote® anti-corrosion protection

Disc-Lock Europe’s Safety Wheel Nuts and HRD Loc-Nuts are coated in an environmentally friendly process called Greenkote®, which is comparable to galvanising, although it is harder wearing and readily accepts all paint systems. Learn more about Greenkote.