Haiyan Ruite Fastener Factory is a professional fastener enterprise. It is located in Haiyan which is in the north of Hangzhou Bay Cross-Sea Bridge, Zhejiang Province, China. It is a manufacturer that mainly produces DIN & ASNI bolts and screws, including DIN933, DIN603, DIN571, hex cap/tap screw, hex lag screw, hex flange bolt, carriage bolt, u-bolt, stud bolt and so on. It also head strong ability to make special screws and bolts. The grade is from 4.8 to 12.9.