Standard:UIC, GOST, GB/TB, DIN, BS, AS, ASTM Hex Nut:1:We produce nuts according to UIC, GOST, GB/TB, ... standard or other specifications required by customers.2:Grade could be ASTM Gr.1,Gr.2,2H ,BS 4,6,8,10 ... ,12,3:Size from 1/2 to1-3/8;M10 to M48;4:Material: Carbon steel ... , West Europe, North Europe, Middle Asia, Southeast of Asia. Hex Nut