LB Foster Rail Products

Tracksure Locking Device

Tracksure’s locking device prevents unintentional nut loosening and offers significant operation and cost benefits. Its design not only provides a fail-safe system that ensures a tight grip, but it also reduces the opportunity for human error.

The product is simple and effective, resisting vibration loosening and settlement. In the event that the original nut starts to loosen, the Tracksure locking nut tightens against it underneath the stainless cover.

The product can be re-used and serviced as necessary, and require no special tools or equipment.


  • Provides safer operating conditions by reducing bolt fatigue.
  • Can be installed without the need for expensive capital equipment.
  • Offers significant cost savings in maintenance-intensive applications.
  • Reduces maintenance significantly and can be replaced quickly and simply where necessary.

Tracksure Kits Include:

  • A modified bolt with a reverse thread added to the end which accommodates both the original nut and the Tracksure locking nut.
  • A right-handed, heavy head nut.
  • A Tracksure locking nut with a left-handed thread.
  • A serrated steel locking cap then pushes down over both the original nut and the Tracksure nut, held in place with a spring clip.

Tracksure’s products have been extensively tested and approved by many rail infrastructure companies throughout the world, as well as independently tested. Tracksure bolts have had successful tests in North America at major transit agencies and are used by Class I railroads. They are also in use with the transit systems in the UK, and Germany, as well in Australia, Holland, Italy and Hungary. They are suitable for any bolted joint which suffers from vibration loosening and/or settlement.

Please click here for the Tracksure product sheet. pdf