Axial Compression

Compressive force between the coils and bolt threading holds the CoiLok™ rock solid against loosening and vibration.

TWE (Thread Wedge Effect)

The sharp end of the CoiLok™ jams into the gap where the bolt threading meets the nut internal threading, preventing the nut from backing out and preventing loosening of both the nut and bolt.


Can be screwed on from either side.

Easy Assembly / Disassembly

Quick and easy to install and remove, by hand, simple tools or for high volume assembly a CoiLok™ Quick Tool can be used.

Radial Compression

Tight tolerance smaller diameter coils exert radial force inwards on the minor diameter of the threading, along the whole length of the coils. CoiLok™ is held firmly in place in all conditions.

How It Works

Easy On & Off

How do I install & disassemble the CoiLok™?

For low volume installation and disassembly, CoiLok™ Locking Fasteners can easily be installed or removed by hand or by using any metal rod like tool such as a screwdriver.

For high volume installation and disassembly, the CoiLok™ Quick Tool is available. Usable by hand, wrench or socket (same size as for the nut/bolt), it makes using the CoiLok™ even easier.