18-8SS Belleville Washer Z Pattern

18-8SS Belleville Washer Z Pattern   DIN 6798A lock washers have external teeth that bite into the mating surface to provide a secure locking action. The standard includes details such as material requirements, dimensions, tolerances, and testing methods for these lock washers. These washers have teeth on the outer circumference that help prevent loosening of the fastener they are used with. They are commonly used in applications where vibration or other factors may cause nuts or bolts to come loose.