Serrated Lock Washer, with external teeth, DIN 6798-A

A Toothed Lock Washer, also known as a Serrated Washer or Star Washer, has serrations that extend radially inward and/or outward to bite into the bearing surface. This type of washer is especially effective as a Lock Washer when used with a soft substrate, such as aluminium or plastic but can still resist rotation more than a Plain Washer on hard surfaces as the tension between washer and the surface is applied over a much smaller area (the teeth). There are four types: Internal Toothed Washers, External Toothed Washers, Combination Toothed Washers, and Countersunk Toothed Washers. The internal style have the serrations along the inner diameter of the washer, which makes them more aesthetically pleasing. The external style have the serrations around the outer diameter, which provides better holding power, because of the greater circumference. The combination style has serrations about both diameters, for maximum holding power. The countersunk style is designed to be used with flat-head screws.

 Specification Requirements:

● Dimensions:DIN 6798, Type A.

● Material:A2 Stainless Steel.

● Finish:Per ASTM A380.