Hexagon head bolt DIN961 M10x1.25x40 steel zinc-plated 8.8 Kramp Hexagon head set screw, fully threaded, metric fine thread. Measurements type Metric Thread diameter M10 Thread pitch 1.25 mm Length 40 mm Head shape Hexagon Thread type Metric fine Wrench/Spanner size 17.0 mm Head height 6,4 mm Quality 8.8 Surface treatment Zinc-plated Material Steel