| | Ningbo Dongxin High-Strength Nut Co., Ltd. We produce the ANSI, DIN, ISO, BS and JIS Nuts and Bolts include standard hex Nuts, slotted hex Nuts, square Nuts, special Nuts and kinds of Bolts. Such as ASTM A449, A490,Grade-5,Grade-8, ASTM A194-2H, 2HM, ASTM A563,and ASTM A193-B7, B7M, A320-L7,A325; DIN6914, DIN6915, DIN960,DIN933/931, DIN934, DIN603/601 series Stud bolts and Studding. | |