class 10.9 partially threaded hex bolt
Half-rib or half-thread hexagon screws are produced in two standards, one DIN931 in general and DIN6914 standard for shed and structure connections. Half rib hexagon screw in class 10.9 has a high level of carbon non-metallic element in chemical compounds, which increases the tensile strength and surface hardness of this screw grade. Tensile tensile strength of class 10.9 half-thread hexagon screw is equal to 1040 newtons/mm2, which means that this class of hexagon screw can withstand a load of 104 kg per square millimeter of the cross-sectional area at the stage of complete failure. The complex heat hardening operation has increased the mechanical capabilities of this class of half rib steel hex bolts.
