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 in ensuring that the bolts meet certain criteria for dimensions, mechanical properties, and material quality, thereby facilitating their use in various engineering and construction applications. The DIN 931 standard is widely recognized and adopted in industries that require reliable fastening solutions, ensuring compatibility and safety in assembly processes. By adhering to these specifications, manufacturers and engineers can ensure that the bolts perform effectively under the intended load conditions and environmental factors.