This document, EN 14399:2005, defines the criteria for high-strength structural bolted assemblies. It covers a comprehensive range of bolted assemblies used in civil applications. The standard establishes guidelines for the design, manufacture, inspection, and testing of bolted assemblies to ensure

DIN 931 specifies the requirements for six-sided head screws. These nuts are widely employed in various fields, from mechanical engineering toassembly. The DIN 931 standard covers parameters such as diameter and thread form. It also sets requirements for material grade and accuracy. Complying with