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

DIN 931 defines the specifications for hexagonal head screws. These fixings are widely employed in numerous industries, from automotive engineering tomanufacturing. The DIN 931 standard covers parameters such as diameter and thread pitch. It also establishes criteria for material grade and accuracy