DIN 933 Fully Threaded Metric Hexagon Head Bolts DIN 933 Fully Threaded Metric Hexagon Head Bolts feature a hexagon head designed for use with standard wrenches or spanners. The term "hexagon head" refers to the six-sided head of these bolts, which allows for easy application of torque using common tools. Fabory's range of hexagon head bolts is manufact