This document, EN 14399:2005, defines the criteria for high-strength structural bolted assemblies. It deals with a broad range of bolted connections used in civil applications. The standard provides methods for the design, fabrication, inspection, and testing of bolted assemblies to ensure their performance. It also specifies the elements that can

DIN 931 defines the requirements for six-sided head bolts. These nuts are commonly used in various applications, from mechanical engineering toconstruction. The DIN 931 standard covers parameters such as length and thread form. It also establishes standards for material grade and precision. Complying with DIN 931 ensures robust connections and bo