External lock washer

External shakeproof from Thomas Potter Ltd

A lock washer (sometimes referred to as a shakeproof washer) works by the teeth of the washer cutting into either the material the fastener is entering, the fastener itself or both.

The external type features teeth on the outside.

Washers with external teeth are best at resisting torque because they grip the largest surface area.


Available in self colour steel, zinc plated steel,stainless steel and phosphor bronze.

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