Video of the Functional Principle

Bolted connections tend to loosen under certain operating conditions. Vibrations can cause peculiar problems as they can overpower the “self-locking effect” of bolted connections. This can lead to functional failure or even to the connection coming apart. As it’s not always possible to know what forces are acting on the structure, and as constructional measures cannot be implemented everywhere, securing elements are often used.
One of the few effective securing technologies available is the HEICO-LOCK® wedge locking system, the effectiveness of which has been demonstrated by the latest experimental standards (including DIN 65151, DIN 25201-4, NASM 1312-7).
An important feature of HEICO-LOCK® wedge lock washers, setting them apart from other systems that are available, is the securing of the bolt fastening using preload force rather than friction
Wedge-shaped cams on the inside of the lock washers, radial teeth on the outside
Interlocking embedding of the radial teeth with the respective mating surface (when tightening the bolted joint)
System movement only possible between the inner wedge shaped cams. Movement across these wedge shaped surfaces effectively self locks the bolt.
Increase in clamping force.
Certified system for securing bolts, working at low and high preload levels.
Particularly suitable for dynamic loads – including when using lubricants. Can be re-used.
Very easy to install and remove (wedge lock washers are supplied as a pre-assembled pair)
Also suitable for high-tensile bolts of 8.8, 10.9 and 12.9 and their respective nuts.
Available in steel, stainless steel and 254-SMO with narrow or wide bearing surfaces – other materials are available upon request.

Size range from M3 – M76 and ¼” – 3” - custom sizes upon request.