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The screw with a semicircular head has the form of an ordinary metal rod, at one end of which there is a head that transmits torque, and at the other end - an external thread. The head of the screw is needed to use special tools (wrench, screwdriver, air or electric gun, etc.) to press the parts of the structure to be connected.
Scope Ideal for screw connections in mechanical engineering.
Material high-strength steel. High strength class 4.8 allows the use of bolts for high-load connections.
Coating Zinc protects against corrosion if you plan to use fasteners in aggressive conditions.