A Tab washer is a type of washer used for fastener connections, designed to provide additional functionality to prevent loosening and sliding. It is usually made of elastic materials, such as spring steel or rubber, and has a special design shape.

The design of the tab washer includes one or more protrusions or protrusions that come into contact with the thread or connection surface, thereby increasing the resistance of the connection. When the bolt or nut is tightened, the protrusion of the tab washer will embed into the connection surface, providing additional friction and tightening force to prevent the fastener from loosening or self-loosening.

Tab washers can be used in various applications, including mechanical equipment, automobiles, aerospace, furniture, and electronic equipment. They can be used for connecting bolts, nuts, studs, and other fasteners, providing reliable anti-loosening and anti-slip functions.