Technical requirements and scope of DIN 7990
The DIN 7990 standard defines the regulatory requirements for design parameters and technical conditions for the implementation of hexagon head bolts intended for use in critical steel structures. The document covers the metric thread size range from M12 to M30, corresponding to product grade C accuracy.
EV Group China engineers emphasize that these fasteners fully meet the criteria of the DIN EN 15048-1 regulation, which establishes rules for non-preloaded bolted assemblies in structural steelwork. If necessary, the customer may agree upon additional technical specifications regulated in Annex A of this standard.
The text of the standard also clearly defines the nomenclature of mating elements: hexagon nuts and plain washers, which are mandatory for use in assemblies with these bolts to ensure the design performance characteristics of the connection.