Tufflock Patches

Tuflok® is a nylon powder which is warmly deposed on a threaded part. While screwing, the nylon is compressed. The radial tension created by the elastic deformation of the product causes a retaining by the increase of friction.

The retaining process is repositionable because the deformation of polyamide is partly reversible and enables to screw and unscrew the part for several times. The retain function is immediately active after screwing.

Tuflok® 180

The coating of Tuflok® 180 is applied at 180° on the periphery of the screw. It offers an excellent resistance to shocks and vibrations. It is also reusable several times.
Tuflok® is even efficient on assemblies put under tension and is particularly recommended for adjusting screws.

Tuflok® 360

The coating of Tuflok® 360 is applied on the entire periphery of the unit. It is recommended for applications which need a high pressure sealing of liquids and gas.
It is also reusable several times.

With HEICO-LOCK® any bolt loosening results in the internal cams separating and their movement across each other results in an increase in tension and clamp load. During removal, only the cam surfaces move, resulting in low off torque force.

Differing Friction Coefficient between HEICO-LOCK® cams and radial ridges

The cams on the separation plane (joint face) of the individual washers of the pair show a much lower friction coefficient (µi) than the friction coefficient on the radial ridges on the outside of the pair of washers (µo).

Any loosening through a dynamic load will always lead to movement only across the face of the cams of the washers.