Standard:UIC, GOST, GB/TB, DIN, BS, AS, ASTM Hex Nut:1:We produce nuts according to UIC, GOST, GB/TB, ... ,10,12,3:Size from 1/2 to1-3/8;M10 to M48;4:Material: Carbon steel or stainless steel, Q195 ... America, West Europe, North Europe, Middle Asia, Southeast of Asia. Hex Nut