Stud, also known as double headed stud or fully threaded stud, is a standard fastening connector without a head and with complete threads on both ends. It is often used in conjunction with nuts, flat washers, and spring washers, and is commonly used in assembly scenarios where single headed bolts are inconvenient to use, such as heavy components, equipment flanges, pressure vessels, and large frames. The products cover various styles such as equal length double head bolts, unequal length double head bolts, fully threaded bolts, welded bolts, non-standard extended bolts, etc., and follow general manufacturing specifications such as national standards, American standards, and German standards. The raw materials are made of high-quality low-carbon carbon steel, medium carbon alloy structural steel, and 304/316 stainless steel, with strength grades covering 4.8, 8.8, 10.9, and 12.9 high-strength specifications. The overall use of cold drawn precision materials and CNC precision rolling processing, with regular thread profiles and uniform accuracy, tight meshing, and multiple disassembly and assembly that is not easy to slip or trip; High strength bolts undergo quenching and tempering heat treatment, resulting in a uniform internal metallographic structure and excellent tensile and fatigue resistance. They are less prone to tensile fracture under long-term vibration and heavy load conditions. The surface can provide various anti-corrosion treatment solutions such as blackening, electroplating, hot-dip galvanizing, Dacromet, zinc nickel alloy, stainless steel polishing, etc., effectively resisting moisture, salt spray, acid and alkali corrosion, and suitable for harsh use environments such as coastal areas, chemical industries, and outdoor environments. The product undergoes multiple quality inspections including tensile load testing, hardness testing, salt spray testing, and thread gauge testing before leaving the factory. The dimensional tolerance is strictly controlled and the interchangeability is strong. Widely used in fields such as pressure vessels, pipeline flanges, steel structure engineering, wind power equipment, engineering machinery, new energy storage, machine tool enclosures, mining equipment, boiler valves, etc. We can provide regular standard specifications in stock, and also support customization of ultra long, ultra thick, special pitch, and irregular non-standard bolts according to drawings. The assembly is evenly stressed and the fastening is reliable, greatly improving the stability of large component connections.