Tension makes the bolt self-locking
Need a washer that secures bolted joints when exposed to severe vibrations and dynamic loads? Nord-lock have created the original wedge-locking technology to make it impossible for their products to loosen unintentionally due to the wedge created under the bolt head and nut.

Nord-lock wedge-locking washers are a quality product that meet the ISO 9001 and 14001 standards along with certificates from BIBt(Deutsches Institut fur Bautenchnik), DNV (Det Norske Veritas), EBA (Eisenbahn-bundesamt) and T220V (Technischer Uberwachungs-Verein).

Each Nord-lock product comes with full traceability and comes laser marked with the Nord-lock brand name, control number and type code to help you track the product right down to the first assembly.

The rise of the cams between the Nord-Lock wedge-locking washers is greater than the pitch of the bolt, in addition there are radial teeth on the opposite side.

The Nord-lock wedge-locking washers are installed in pairs, cam face to cam face. So to put it simply - it takes more force to loosen the nut then to tighten it - so it does not loosen!

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