This specification, EN 14399:2005, defines the requirements for high-strength structural bolted assemblies. It addresses a broad range of bolted connections used in engineering applications. The standard outlines guidelines for the design, fabrication, inspection, and testing of bolted assemblies to

DIN 931 defines the requirements for hexagonal head screws. These bolts are commonly used in various fields, from mechanical engineering toconstruction. The DIN 931 standard covers sizes such as diameter and thread pitch. It also defines criteria for material composition and accuracy. Following DI