This document, EN 14399:2005, defines the criteria for high-strength structural bolted assemblies. It covers a broad range of bolted joints used in structural applications. The standard establishes procedures for the design, production, inspection, and testing of bolted assemblies to ensure their reliability. It also specifies the elements that can

DIN 931 defines the requirements for hex head fasteners. These nuts are commonly used in numerous fields, from mechanical engineering toassembly. The DIN 931 standard covers parameters such as length and thread form. It also sets standards for material composition and accuracy. Following DIN 931 ensures robust connections and enhances the integri