This specification, EN 14399:2005, defines the criteria for high-strength structural bolted assemblies. It covers a broad range of bolted joints used in structural applications. The standard outlines guidelines for the design, fabrication, inspection, and testing of bolted assemblies to ensure their safety. It also specifies the materials that can

DIN 931 defines the standards for hexagonal head bolts. These nuts are commonly used in diverse applications, from mechanical engineering toassembly. The DIN 931 standard covers parameters such as length and thread form. It also defines requirements for material quality and accuracy. Complying with DIN 931 ensures robust connections and improves