Hexagon screw according to DIN EN ISO 4017, including toothed flange nut according to DIN EN 1661. The strength class of the screw is stamped on the screw head. Especially for connections that have to transfer vertical loads through friction, it is essential to pay attention to the screw tightening torque and to check it with the torque wrench! In product combinations (hexagon screw with nut), the lower strength class is to be used to determine the torque. Dimensions (approx. dimensions) Thread: M 8 Screw length: 40 mm Screw strength class: 70 Nut strength class: 70 Screw tightening torque: 24.6 Nm Material: Stainless steel, material no. 1.4301, 1.4303