... , ASTM Grade could be ASTM Gr.1,Gr.2,BS 4,6,8,10,12 Nylon Insert Nut1:We produce nuts according to ... :Grade could be ASTM Gr.1,Gr.2,2H ,BS 4,6,8,10,12,3:Size from 1/2 to1-3/8 ... America, West Europe, North Europe, Middle Asia, Southeast of Asia. Nylon Insert Nuts