DIN 6916 specifies the dimensions and materials for heavy washers that are used with high-strength structural bolts. These washers are designed to provide a larger bearing surface and to distribute the load over a wider area, thus reducing the risk of material damage. The standard includes detailed specifications for the internal and external diameter, as well as the thickness of the washers, ensuring that they are suitable for their intended purpose. By adhering to these standards, engineers and construction professionals can ensure the safety and integrity of their structures, as well as the longevity of the materials used.