Flat washers are usually thin pieces of various shapes that are used to reduce friction, prevent leakage, isolate, prevent loosening, or distribute pressure. Many materials and structures have such components, which are used to perform various similar functions. Limited by the material and process of threaded fasteners, the supporting surface of bolts and other fasteners is not large, so in order to reduce the compressive stress of the pressure-bearing surface to protect the surface of the connected part, washers are used.
8.8 level features: Low carbon steel has low strength and hardness, high plasticity and toughness, good weldability, good forgeability and punchability, and low carbon content also brings better corrosion resistance.