Haiyan Chaoqiang standard fastener co. located in the beautiful China Eastern Hangzhou-jiaxing-huzhou area.The company is set up in 1998, area covered 15000 squre meters,it?s specialized in hex nuts, we have 60 sets advanced equipment. We have 200 employees more or less, 20 technology personnel. We mainly produce DIN?ANSI, DIN934hex nuts, DIN 439 hex nuts,DIN6923 flange nuts, DIN985/982 nylon lock nuts, both hex nuts, asme hex nuts 2H, machine nuts, UNI 5587 nuts, BS nuts, also have GB and UNI , the strength is reach 6 class ,8 class ,10 class.