China Fasteners manufacturers Double stud. Used to connect the mechanical fixed link function, the double head bolt has thread at both ends, the middle screw, thick and thin. Generally used in mining machinery, Bridges, cars, motorcycles, boiler steel structure, crane tower, large span steel structure and large buildings, etc. surface treatment锛?span style="color: rgb(46, 48, 51); font-family: Arial, "Microsoft YaHei", 寰蒋闆呴粦, 瀹嬩綋, "Malgun Gothic", Meiryo, sans-serif; font-size: 14px; font-variant-numeric: normal; font-variant-east-asian: normal; line-height: 18px; background-color: rgb(255, 255, 255);"Stud bolts generally need surface treatment. There are many kinds of bolt surface treatment. The commonly used ones are electroplating, blackening, oxidation, phosphating and non-electrolytic zinc coating treatment. However, electroplated fasteners account for a large proportion in the actual use of fasteners. Especially in automobiles, tractors, household appliances, instruments and meters, aerospace, communications and other industries and fields are more widely used. However, for threaded fasteners, it is not only required to have certain anticorrosion ability in use, but also to ensure the interchangeability of threads, which can also be called the screw property here. In order to meet the dual performance of "anti-corrosion" and "interchangeability" of threaded fasteners, it is necessary to establish special electroplating standard. Supply Ability 100000 Piece/Pieces per WeekChina Fasteners manufacturers website:http://www.hbbestbuyhardware.com/fasteners/