Metric Hex Bolts DIN 931

Our DIN931 Hex Cap Screws are manufactured to strict metric standards, featuring a partially threaded shank and a standard hexagon head designed for general engineering applications. As reliable DIN931 Hex Bolt options, these fasteners offer an unthreaded shank beneath the head, which provides excellent shear strength and precise alignment in bolted connections. Specifically, our Grade8.8 DIN931 Metric Hex bolt combines medium carbon steel with quenching and tempering heat treatment, delivering a minimum tensile strength of 800 MPa and yield strength of 640 MPa. These bolts are widely used in machinery assembly, steel structures, automotive components, and industrial equipment. DIN 931 is technically equivalent to ISO 4014 and is available in coarse thread pitches, with property classes ranging from 4.6 to 10.9. For Grade 8.8 applications, proper nut matching (e.g., Grade 8 or 8S) and correct torque values are recommended.