Tracksure’s award-winning locking device prevents unintentional nut loosening
and offers infrastructure managers significant operational and cost benefits.
Unlike other fasteners it can be simply maintained and does not require
expensive capital equipment to install.

The Tracksure locking device:
- A modified bolt with a reverse thread added 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, held in place with a spring 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.

- The principle behind the device works with many different track and rolling stock applications. Examples include:-

• Brake/Retarder systems
• Crossings
• Tightly curved track
• Temporary clamps & joints
• Fishplates/Insulated joints

- It can also be tailored for bespoke applications
- It is suitable for retro-fitting to existing track and for OEM applications

The benefits
- Tracksure's locking device is a fail-safe system that drastically reduces the opportunity for human error
- It maintains clamp force securing the bolt firmly, thus reducing bolt fatigue that can lead to cracking and elongation of bolt holes
- It can be installed without the need for expensive capital equipment
- It offers significant cost savings in maintenance-intensive applications
- The product reduces maintenance significantly and can be replaced quickly and simply where necessary

An example of how the Tracksure locking devices can deliver tangible benefits is illustrated in Holland where M24/33mm hex nuts were installed by ProRail in a marshalling yard braking system in late 2006