DIN931 is a globally recognized standard for partially threaded hex head bolts, specifying dimensions, tolerances, and material properties for industrial applications. These bolts feature a hexagonal head and a shank with threads covering approximately two-thirds of the length, balancing shear strength in the unthreaded portion and tensile capacity in the threaded section. Commonly manufactured from carbon steel (grade 8.8) or stainless steel (A2-70), DIN931 bolts are heat-treated to achieve yield strengths of 640–830 MPa, suitable for heavy machinery, automotive chassis, and structural steel frameworks. A case study involves their use in wind turbine assembly, where DIN931 bolts connect tower sections, enduring cyclic loads and vibrations while maintaining tight tolerances to prevent misalignment. For projects requiring compliance with European or international standards, our team provides certified DIN931 bolts with traceable material reports and batch testing results. Contact us to explore grade options, plating finishes, and custom thread configurations.
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