This document, EN 14399:2005, defines the requirements for high-strength structural bolted assemblies. It deals with a comprehensive range of bolted joints used in structural applications. The standard establishes guidelines for the design, fabrication, inspection, and testing of bolted assemblies to ensure their performance. It also specifies the

DIN 931 outlines the requirements for hexagonal head screws. These nuts are widely employed in various industries, from automotive engineering tomanufacturing. The DIN 931 standard covers parameters such as diameter and thread form. It also sets standards for material grade and precision. Adhering to DIN 931 ensures reliable connections and enhan