Standard: DIN, BS, AS, ASTM Grade could be ASTM Gr.1,Gr.2,BS 4,6,8,10,12 ... :We produce nuts according to UIC, GOST, GB/TB, DIN, BS, AS, ASTM standard or other specifications required by customers.2:Grade ... could be ASTM Gr.1,Gr.2,2H ,BS 4,6,8,10 ...