This standard, EN 14399:2005, defines the criteria for high-strength structural bolted assemblies. It deals with a comprehensive range of bolted assemblies used in engineering applications. The standard establishes procedures for the design, manufacture, inspection, and testing of bolted assemblies to ensure their reliability. It also specifies the

DIN 931 specifies the requirements for six-sided head fasteners. These nuts are frequently utilized in various industries, from mechanical engineering toconstruction. The DIN 931 standard covers sizes such as diameter and thread type. It also defines requirements for material composition and accuracy. Following DIN 931 ensures durable connections