Ningbo Donghai Fastener Manufacturing Co.,Ltd is a leading bolts,nuts,studbolts and tailor made fastener factory located in Ningbo,China. It covers an area of 18000 square meters and has a productivity of 2000 tons annually. Main products include: ASTM A194 2H HEAVY HEX NUTS,A563 HEAVY HEX NUTS GR.C,GR.DH,ASTM A563M GR.10S,DIN934/6915 HEX NUTS,FINISHED HEX NUTS ASTM A325/490 HEAVY STRUCTURAL BOLTS,DIN931/933 HEX BOLTS,FINISHED HEX BOLTS,HEX CAP SCREWS ASTM A193 B7/B7M THREADED ROD,STUDBOLTS,DIN975 GR/4/8 THREADED ROD