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

DIN 931 specifies the requirements for hexagonal head fasteners. These nuts are widely employed in various industries, from mechanical engineering toconstruction. The DIN 931 standard covers parameters such as diameter and thread form. It also defines standards for material grade and precision. Complying with DIN 931 ensures reliable connections