Shanghai Jinrui Norm Parts Supplies Co., Ltd. was built in 2001 which located in Baoshan District adjacent to the Bao Steel Group.Shanghai Jinrui is a fastener enterprise who owes a set of R & D,Website:http://www.chinajinrui.net, design, production and sales of high quality.Since the establishment of Jinrui, an annual production capacity of 10000 tons fasteners has been achieved.Hex socket screw used in electric power facilities,electric appliance,chemical engineering mechanical equipment and so on.And usually used with nut and washer.And normal socket screw tensile strength is High to 1000Mpa and more.StandardGradeStainless steelFinshGB standard hex socket screw GB/T70.18.8304white zincyellow zinc black oxideH.D.GDacromet...10.931612.9