This document, EN 14399:2005, defines the criteria for high-strength structural bolted assemblies. It deals with a comprehensive range of bolted assemblies used in engineering applications. The standard provides guidelines for the design, manufacture, inspection, and testing of bolted assemblies to

DIN 931 outlines the requirements for six-sided head fasteners. These bolts are widely employed in diverse applications, from structural engineering tomanufacturing. The DIN 931 standard covers parameters such as length and thread type. It also defines criteria for material quality and precision.