This standard, EN 14399:2005, defines the criteria for high-strength structural bolted assemblies. It addresses a wide range of bolted connections used in civil applications. The standard establishes procedures for the design, production, inspection, and testing of bolted assemblies to ensure their

DIN 931 defines the specifications for six-sided head screws. These bolts are widely employed 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 accuracy. Adhering to DIN 9