Dimple Washers

Dimple washers are specialized mechanical fasteners featuring a raised bump, detent, or recessed indentation (dimple) designed to control orientation, verify bolt tension, or allow flush seating. 

Dimple washers are specially formed metal washers featuring a raised or recessed dimple. Depending on their design and application, they can help provide spacing, support, load distribution, or a locating feature in an assembly.