... . 2.Grade: 4.8, 5.6, 5.8, 6.8, 8.8, 10.9. 3.Finished: plain, zinc Material: stainless steel, carbon steel, iron.Grade: 4.8, 5.6, 5.8, 6.8, 8.8, 10.9 ... .Finished: plain, zinc plated, HDG.Size: M6-M60, 1/4”-2.1/2”Length ... visiting and we look forward to the future with you. 4.8, 5.6, 5.8, 6.8, 8.8, 10.9 bolt and nut