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

DIN 931 specifies the standards for six-sided head fasteners. These fixings are commonly used in various fields, from automotive engineering toconstruction. The DIN 931 standard covers sizes such as diameter and thread type. It also sets criteria for material grade and tolerances. Adhering to DIN 931 ensures reliable connections and enhances the