We ZHEJIANG AOZHAN INDUSTRIAL CO.,LTD. are the biggest manufacturer involving stainless fasteners in CHINA with the total area of 200000sqm. The high quality and best service privilege us the most competitive factory in CHINA. Our main products include HEX NUT, WING NUT, DOMED NUT, HEX BOLT, HEX SOCKET BOLT, TAPPING SCREW, SPRING WASHER, THREADED RODS and so on. The products carried by DIN,ANSI/AMSE,JIS,ISO. Our annual production ability can up to 200000 ton.