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

DIN 931 specifies the specifications for hexagonal head screws. These bolts are widely employed in diverse applications, from mechanical engineering tomanufacturing. The DIN 931 standard covers sizes such as diameter and thread type. It also establishes standards for material quality and precision. Adhering to DIN 931 ensures durable connections