These high strength hexagon socket screws are made of premium 8.8 grade carbon steel, designed with full thread structure and available in M3 to M12 complete specifications. Multiple surface treatments are optional, including black finish, white zinc plating and color zinc plating to meet different anti-rust and appearance requirements. Precision manufacturing ensures standard and neat thread, smooth assembly and stable fastening performance. The screws feature high hardness, strong tensile strength and good toughness, not easy to deform or slip under heavy load. Different surface treatments provide reliable corrosion and wear resistance for various working environments. Widely used in mechanical equipment, mold assembly, electronic hardware, industrial machinery and other fastening scenarios. Standard sizes are in sufficient stock, factory direct supply supports bulk wholesale, and non-standard customized specifications can also be processed as required.