This document, EN 14399:2005, defines the specifications for high-strength structural bolted assemblies. It addresses a comprehensive range of bolted assemblies used in structural applications. The standard outlines guidelines for the design, production, inspection, and testing of bolted assemblies to ensure their reliability. It also specifies the

DIN 931 specifies the requirements for six-sided head fasteners. These fixings are widely employed in diverse fields, from automotive engineering tomanufacturing. The DIN 931 standard covers dimensions such as diameter and thread form. It also sets requirements for material quality and precision. Following DIN 931 ensures reliable connections and