Heavy Duty Safety Washers as per DIN6796 are generally used for heavy duty bolts. they has been specially developed for high-strength bolts of grades 8.8-10.9. These load washers conform to DIN 6796 and are designed for high demands on the protection of bolt joints. Gasket set or a quantity of expansion or contraction cycles can cause loosening of the bolt and these heavy duty washers are designed to prevent such an occurrence.