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

DIN 931 outlines the requirements for hex head screws. These nuts are frequently utilized in diverse fields, from mechanical engineering toassembly. The DIN 931 standard covers sizes such as head size and thread form. It also sets requirements for material grade and precision. Complying with DIN 931 ensures durable connections and enhances the sa