DIN 931 refers to a specific standard established by the Deutsches Institut für Normung (DIN), which outlines the specifications for hexagon head bolts with a partially threaded shank. This standard is crucial for ensuring the quality and compatibility of fasteners used in various engineering and construction applications. The DIN 931 standard provides detailed information regarding the dimensions, tolerances, and material properties of these bolts, thereby facilitating their proper selection and use in assemblies where strength and reliability are paramount. Adhering to this standard helps manufacturers and engineers maintain consistency and safety in their projects, ultimately contributing to the overall integrity of the structures being built.