DIN 931 Hex Cap Screw

The DIN 931 Hex Cap Screw features a partially threaded shank and a standard hexagon head, designed for metric coarse thread applications where precise clamping force and shear resistance are required. Our DIN931 Black Hex Bolt Grade10.9 is quenched and tempered to achieve high strength, with a minimum tensile strength of 1040 MPa and yield strength of 940 MPa. The black oxide finish provides basic corrosion resistance and a smooth, oil-absorbing surface, making it suitable for interior machinery, automotive assemblies, and industrial equipment. As a key product under DIN931, this standard specifies hexagon head bolts with coarse thread and variable thread length depending on the overall bolt length. Grade 10.9 DIN 931 bolts are commonly used in high-load structural connections, heavy machinery, and engine components where superior strength is critical.