The Tracksure Product

Tracksure’s award-winning locking device prevents unintentional nut loosening and offers infrastructure managers significant operational and cost benefits.

It is simple, effective, and requires no expensive capital equipment to install (as illustrated in this video) 


  • Tracksure products are proven to prevent unintentional nut loosening. Less track failure, less "boots on ballast", enhance worker and passenger safety!
  • Maintenance regimes can be simplified, improving operational efficiency 
  • It will save money over the lifetime of the asset 


The Tracksure locking device consists of:

  • A modifed bolt with a reverse thread to the end which accommodates both the original nut and the Tracksure locking nut
  • A locking nut is applied on to the reverse thread until it tightens against the original nut
  • A serrated steel locking cap then pushes down over both the original nut and the Tracksure nut, which is held in place with a string clip 

If the original nut starts to loosen (even microscopically) the locking nut tightens on the reverse thread with the locking cover combining both actions, ensuring a fail-safe bolt fixing.


Tracksure products are already in use with London Underground in the UK, as well in Spain, Italy, Holland, Hungary, Australia and North America. They are suitable for any bolted joint which suffers from vibration loosening and/or settlement.

It comes in a range of sizes from M12 upwards and is suitable for retro-fitting to existing track and for OEM applications. It can also be tailored for bespoke applications.

We currently supply products for Brake Retarder systems, Breather Switches, Crossings, Tightly curved track, Temporary clamps & joints and Fishplates/Insulated joints. The Track Applications page provides further detail


Tracksure’s products have been extensively tested and approved by many rail infrastructure companies throughout the world, as well as independently tested:

Further details of all testing , trial data and approvals are available by contacting Tracksure, including Junkers tests and Fraunhofer Institute testing.

Registered Company Number 04757497
The WS Group,Tracksure & Wheelsure logo devices are trademarks of Wheelsure Holdings Limited.