Heavy Duty Belleville Washers, also known as Conical Washers, are generally used for
heavy bolted sections. For example, pipe flanges, transformers, pressing machines
and bus-bars. They are compatible with high tensile bolts. These are manufactured
to DIN 6796 specifications.

These Washers are available to purchase online… simply click this link to view the range: https://springfasteners.co.uk/product-category/disc-springs/heavy-duty-disc-springs-din-6796/