Shakeproof Washers can be made as External Types or Internal Types depending on application.

Shakeproof Washers contain a serrated edge which enables is to be held in place by biting into the surface. They are used in applications where there are fastenings with a larger head which will resist the force of the washer being compressed as well as holding the surface.

These Washers can also be known as Tooth Locking Washers. They are most commonly finished in a bright zinc plate for corrosion resistance.

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External Type (DIN 6797A) – https://springfasteners.co.uk/product-category/shakeproof-washers-zinc-plated-internal-external/external-tooth-lock-washers-din-6797/

Internal Type (DIN 6797J) – https://springfasteners.co.uk/product-category/shakeproof-washers-zinc-plated-internal-external/internal-tooth-lock-washers-din-6797/