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23895

DOUBLE SERRATED LOCKWASHER 4MM (DD) E/G

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A lock washer is a specialised washer designed to prevent nuts and bolts from loosening due to vibration, movement, or dynamic loads. Unlike flat washers, locking washers apply tension, friction, or mechanical interference to keep fasteners secure. Common designs include split (spring) washers, wedge-lock pairs, toothed/star washers, and serrated types. Each style provides resistance against rotation, helping maintain bolt tension in demanding environments.

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