This standard, 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 establishes guidelines for the design, manufacture, inspection, and testing of bolted assemblies

DIN 931 defines the specifications for hexagonal head bolts. These nuts are frequently utilized in numerous applications, from structural engineering toassembly. The DIN 931 standard covers dimensions such as diameter and thread form. It also defines standards for material composition and accuracy.