This document, EN 14399:2005, defines the criteria for high-strength structural bolted assemblies. It deals with a wide range of bolted joints used in engineering applications. The standard provides guidelines for the design, manufacture, inspection, and testing of bolted assemblies to ensure their

DIN 931 specifies the standards for six-sided head fasteners. These nuts are widely employed in numerous industries, from mechanical engineering toassembly. The DIN 931 standard covers dimensions such as diameter and thread type. It also sets criteria for material composition and accuracy. Followi