Bolts are essential basic fastening standard components in industrial manufacturing and engineering infrastructure. They are formed by the integration of bolt heads and threaded rods, and are used in conjunction with nuts, flat washers, and spring washers to achieve a secure connection of components through threaded engagement. They are widely used in the assembly and fixation of various equipment, steel structures, and engineering machinery. The product category is complete, including external hexagon bolts, internal hexagon bolts, flange bolts, track plate bolts, anti loosening bolts, segmented step bolts, double headed bolts, etc., covering general specifications such as national standards, American standards, German standards, etc., which can meet diverse working conditions such as light load assembly, heavy load bearing, high-frequency vibration, and outdoor anti-corrosion. The raw materials for the product are high-quality carbon steel, 40Cr/42CrMo medium carbon alloy steel, 304/316 stainless steel, etc., with strength grades covering 4.8, 8.8, 10.9, and 12.9. Adopting the cold heading integrated molding process, the overall structure is dense without pores or cracks; The thread is processed by high-precision rolling, with a regular and full tooth shape, smooth meshing, and multiple disassembly and assembly, making it difficult for the thread to slip off. Grade 8.8 and above high-strength bolts undergo quenching and tempering heat treatment, balancing high tensile strength and impact toughness. They are not easily stretched or broken under long-term vibration, heavy load and pressure environments. The surface can provide various anti-corrosion treatments such as blackening, electroplating, hot-dip galvanizing, Dacromet, zinc nickel alloy, stainless steel polishing, etc. The coating has strong adhesion and effectively resists rainwater, mud, salt spray, acid and alkali erosion. It is suitable for indoor drying, open-pit mining, coastal, chemical and other complex use environments. All finished products undergo multiple quality inspections such as thread gauge testing, hardness testing, tensile load testing, salt spray corrosion resistance testing, etc. The dimensional tolerances are strictly uniform and the interchangeability is excellent. The product is suitable for multiple industries such as engineering machinery, mining equipment, steel structure factories, wind and photovoltaic power, rail transportation, new energy storage, machine tool molds, municipal bridges, and automotive parts. There is sufficient stock of standard and conventional specifications, and non-standard bolts such as elongated, thickened, fine toothed, irregular steps, and special heads can be customized according to drawings and samples. The assembly is stable and reliable, effectively ensuring the safety of the connection between the whole machine and the engineering structure.