Tab Lock Washer

They work to lock a part in place and are most often used in applications where there are drastic heat conditions or heavy vibrations.

Tab lock washer.

Split star and tab lock washers are commonly used in airplane manufacturing. Tab lock washers bend one tab against the side of the mounting surface and the other tab against the flats on a bolt or nut to prevent both the fastener and washer from turning and loosening in high vibration applications such as a motor mount. It can have internal or external teeth for gripping and can be split through one part of the ring. The tabs lock over the edge of the assembly base or in a predrilled hole.

The ears are bent up by the user to lock the nut in place. Tab lock washers are designed to prevent both the washer and the nut from rotating in an assembly. A lock washer is designed to prevent a secured joint that is fastened with a bolt or screw from turning or loosening in response to shock or vibration. Bend the tab of these lock washers against the flats of a hex nut or bolt head to prevent the fastener and washer from turning and loosening.

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