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

DIN 931 defines the requirements for hex head fasteners. These nuts are commonly used in numerous fields, from automotive engineering toassembly. The DIN 931 standard covers sizes such as length and thread form. It also establishes standards for material grade and precision. Complying with DIN 931