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product information: machine screw Thread:UNC ,UNF Length :full thread and half thread Size:M4-M100,1/2"-8-1/2" Material: 2205 2304 2520 2507 F55 253mA Uns No6625 C63000,7075,6063 Company introduction：Shanghai Jinrui Norm Parts Supplies Co., Ltd was founded in 2001, which locates in Baoshan district, Shanghai, China. Its close to Bao Steel Group. Its a fastener group that integrates product development, design, production and sales. Our group has total assets of 100 million rmb, occupying an area of 10,000 square meters. Our products have been selling to more than 35 countries. Its branches include: Shanghai Xingrui Screw Factory(Headquarter), Shanghai G&T Industry Co. Ltd ( Exporting Office) and Jiaxing Shuo Yuan Fastener Manufacturing Co., Ltd(Branch) With the philosophy of pursuing excellence and innovation, our company has purchased multifunctional head forming machines, thread rolling machines, nut machines, hot rolling machines, lathes, large hot stamping machines and associated testing equipment, such as magnetic detection machines. metallurgical analysis apparatus, salt spray tester,optical emission spectrometer and optical screening machine, we have an independent research and development department, which can produce high-quality national standard (GB), German standard (DIN), American standard (ANSI), JIS and ISO international standard bolt, nut,threaded rod,stud bolt, they are widely used in petroleum, chemical, boiler, wind power, highway guardrails, elevator guide rails, machinery manufacturing, construction sites, auto parts and medical equipment. Our main products： 1.Bolt：Carriage bolt，hex bolt, socket head bolt，flange bolt； 2.Threaded Rod：full threaded rod，stud bolt, double end stud bolt; 3.Nut：hex nut，flange nut，heavy hex nut，square nut, tee nut, wing nut; 4.Screw：self-drilling screw，self-tapping screw, wooden screw, machine screw; 5.Washer：flat washer, spring washer, square washer, lock washer; 6.Customized products based on drawings. 32750 32760 Duplex Steel hex bolt