... steel.3. Grade of hex nut: Grade 4.8, Grade6.8, Grade8.8, Grade10.9, Grade12.9. Inch standard: ... ''Material:Carbon steel, Q195, 35KNut Grade:Class4.8, 6.8, 8.8, 10.8and12.9; inch grade:gr2 and ... HDG, blackStandard:DIN934, ISO4032, ANSIHead mark:S |8|, S 8, S 10 and according to customer's requirementCertification ... ) Product list5)Factory:6) Packing:7) Office building:8) Certification:9) Shipping: