Standard:UIC, GOST, GB/TB, DIN, BS, AS, ASTM Hex Nut:1:We produce nuts according to UIC, GOST, GB/TB, ... specifications required by customers.2:Grade could be ASTM Gr.1,Gr.2,2H ,BS 4,6,8,10,12,3:Size from ... America, West Europe, North Europe, Middle Asia, Southeast of Asia. Hex Nut