The Heico-Lock system

'HEICO-LOCK' washers are wedge locking washers that positively lock fasteners using tension instead of friction.

The 'Heico-Lock' System is a pre-assembled pair of washers that have inclined clams on the inside and radial teeth/ridges on the opposite sides.

Tightening of the bolt and/or nut leads to a gripping action of the teeth thus seating the surfaces. Tightening locks the 'Heico-Lock' washers in place. Movement is only possible across the face of the cams. Working together, both sides of the locking washers combine into a fastening system that prevents loosening of joints by shock and vibration.

Typical Assemblies