Material:Carbon Steel,Stainless Steel etc Standard:ASME/ANSI B18.31.1M, DIN975,/ANSIB18.31.2, DIN976 Place of Origin:Hebei, China Size:1/4鈥?3鈥? M6-M64/Customized Size Finish:Plain, Zinc Plated, Black oxide, Nickel,Chrome, H.D.G Port:Tianjin Port Package:Buyer's Requirement Product description: Stud bolts generally need to undergo surface treatment. There are many types of bolt surface treatments. Generally,electroplating, blackening, oxidation, phosphating, and non-electrolytic zinc flake coating are commonly used. It is especially widely used in industries and fields such as automobiles, tractors, home appliances, instrumentation, aerospace, and communications. For threaded fasteners, not only a certain anti-corrosion ability is required in use, but also the interchangeability of threads must be guaranteed, which can also be referred to as screwability here. In order to simultaneously meet the dual use performance of "anti-corrosion" and "interchangeability" required by threaded fasteners in use, it is very necessary to formulate special plating standards.China Double End Studs Stainless website:http://www.dnfastener.com/double-end-stud/double-end-studs-stainless/