TEC Series Washers keep joints secure using tension, not friction, as with traditional locking fasteners. TEC Washers consist of a pair of washers with cams on one side and radial teeth on the other. The cam sides are joined together with a mild adhesive and installed between the bolt head or the nut and the joint material.
During installation, the radial teeth cause one half of the washer to be seated to the bolt or nut, while the other half is seated to the joint material.
When exposed to load or vibration, the bolt or nut will attempt to loosen. Since one half of the washer is seated to the bolt or nut, it attempts to rotate as well. Because of the cam angle (a) of the washers is greater than the thread pitch (ß) of the bolt, a wedge effect is created by the cams, preventing the bolt or nut from rotating loose. Clamp load is maintained and the joint remains secure.