This document, EN 14399:2005, defines the requirements for high-strength structural bolted assemblies. It covers a wide range of bolted connections used in structural applications. The standard provides procedures for the design, fabrication, inspection, and testing of bolted assemblies to ensure their reliability. It also specifies the components

DIN 931 specifies the specifications for six-sided head bolts. These fixings are widely employed in various industries, from automotive engineering toassembly. The DIN 931 standard covers dimensions such as diameter and thread type. It also establishes criteria for material quality and precision. Adhering to DIN 931 ensures robust connections and