The DIN 6916 standard published by the German Institute for Standardization (DIN) describes the requirements for round washers for high-strength structural steel bolting.
Similarly, in the European standard EN 14399-6, together with the first and second parts of the standard, large series of hexagonal high-strength structural bolts with thread sizes from M12 to M36 and flat with hardened and tempered chamfers are intended for bolting assemblies with nuts. The requirements for washers are described (EN 14399-6 High-strength structural bolting assemblies for preloading - Part 6: Flat chamfer washers). According to this standard, washers are not designed for use in direct contact with oversized or slotted holes.
In the DIN 6916 standard, the requirements for round washers for high-strength structural steel bolting are under the following headings:
Bolts are usually made of steel or stainless steel. The strength of the bolts is directly related to the materials used to make them. Depending on the intended use of the bolt, different steel grades are used. The higher the tensile strength, the tighter the bolt connection and the more torque the bolt can take.
Flat bevel washers are also known as hardened washers. Used with high-strength friction bolting assemblies. It is designed to distribute force into the material over a larger area, rather than preventing the bolt head or nut from sinking into the material or deforming under load.
Our organization, among the numerous test, measurement, analysis and evaluation studies it has given for businesses in various sectors, with its trained and expert staff and advanced technological equipment, within the scope of DIN 6916 standard, for round washers for high-strength structural steel bolting, and within the scope of EN 14399-6 standard. also provides testing services for high-strength structural bolting assemblies (flat chamfer washers) for preload.
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