This document, EN 14399:2005, defines the criteria for high-strength structural bolted assemblies. It addresses a comprehensive range of bolted joints used in structural applications. The standard provides guidelines for the design, manufacture, inspection, and testing of bolted assemblies to ensure their performance. It also specifies the elements

DIN 931 specifies the specifications for hex head bolts. These nuts are widely employed in various applications, from structural engineering toconstruction. The DIN 931 standard covers dimensions such as length and thread form. It also defines standards for material grade and precision. Adhering to DIN 931 ensures reliable connections and improve