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

DIN 931 outlines the specifications for six-sided head fasteners. These nuts are commonly used in various applications, from structural engineering tomanufacturing. The DIN 931 standard covers sizes such as diameter and thread type. It also establishes standards for material quality and precision. Complying with DIN 931 ensures durable connection