... .3. Grade of hex nut: Grade 4.8, Grade6.8, Grade8.8, Grade10.9, Grade12.9. Inch standard: ... non-standard products welcome.6. Surface treatment: Plain, black finished, Zinc plated, Hot Dip Galvanized.7. Packing ... Material:Carbon steel, Q195, 35KNut Grade:Class4.8, 6.8, 8.8, 10.8and12.9; inch grade:gr2 ... blackStandard:DIN934, ISO4032, ANSIHead mark:S |8|, S 8, S 10 and according to customer's ...