A tab washer is a stamped locking washer with one or more bendable tabs designed to stop nuts and bolts from loosening. After tightening, a tab is folded against a nut flat, bolt head, or into a slot to prevent rotation. Some designs include internal or external anti-rotation tabs that fit into a keyway, ensuring the washer remains fixed in place. Tab washers provide a dependable, mechanical locking method ideal for assemblies exposed to vibration or movement.
