NORDIC NUT
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TEC Series washers secure joints using tension rather than 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 and/or 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 wil attempt ot loosen. Since the radial teeth are seated ot the mating surfaces, any movement ni the loosening direction is forced between the cam.
Because the cam angle (a) of the washers is greater than the thread pitch angle (/3) 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.
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