Bolts are basic fastening standard components in the fields of mechanical manufacturing and engineering construction, often used in combination with nuts, flat washers, and spring washers. They rely on thread engagement to achieve reliable connection and fixation of components, and widely serve as the "connecting skeleton" of various equipment structures. The product covers a full range of categories including external hexagonal bolts, internal hexagonal bolts, carriage bolts, flange bolts, expansion bolts, double headed bolts, and non-standard shaped bolts, which can meet different working conditions such as light load assembly, heavy load bearing, outdoor anti-corrosion, and precision equipment. High quality carbon steel, medium carbon alloy steel, 304/316 stainless steel, copper alloy and other materials are selected as raw materials, and high-strength bolts are classified into 4.8 grade, 8.8 grade, 10.9 grade, and 12.9 grade according to their strength levels. Using cold heading integrated molding, CNC rolling, and precision heat treatment technology for processing, the thread pattern is uniform and clear, and the bite is smooth and not easy to slip; High strength products undergo quenching and tempering heat treatment, possessing both tensile strength and fatigue resistance, making them less prone to fracture and deformation under heavy load conditions. The surface can be treated with various anti-corrosion treatments such as blackening, galvanizing, hot-dip galvanizing, Dacromet, zinc nickel alloy, polishing, etc., effectively resisting rainwater, salt spray, acid and alkali corrosion, and extending the service life of outdoor, chemical, and coastal environments. Standardized testing is carried out throughout the production process, including hardness testing, tensile load testing, salt spray corrosion resistance testing, thread accuracy testing, etc. The dimensional tolerances are strictly compliant, the interchangeability is strong, and it is compatible with multiple national standards such as national standards, German standards, American standards, and Japanese standards. Suitable for industries such as engineering machinery, new energy equipment, steel structure construction, rail transit, photovoltaic wind power, machine tool equipment, furniture and hardware, pipeline assembly, municipal infrastructure, etc. It can be purchased in bulk standardization or customized with non-standard special specification bolts according to equipment drawings, with easy fastening and disassembly, greatly improving equipment assembly safety and structural stability.