DIN 931 / ISO 4014, HEXAGON BOLTS, Technical Specification and Weight Chart of Partial Threaded Hex Bolts as per DIN 931 / ISO 4014. Hexagon Bolts are created to DIN 931, and are a partially threaded fastener with a hexagon-shaped head that is usually fixed with a spanner or socket https://www.capitalbolts.in/din-931