M16*53 Track Shoe Bolt&Nut Class: 10.9, 12.9 grade CE certifation Hardness: HRC36- ... 18.2.6 (ASTMA325,A490), JISB1186 AS1252Grade:8.8S, 10.9S , Size:M12-M36 Material:Carbon Steel,Alloy SteelTrack ... Carbon steel: Grade/class 4.8, 5.8, 8.8, 10.9, 12.9... Stainless steel: SS201, SS304, SS316... Hang ... & distributors in Europe & America & South Africa etc. M16*53 Track Shoe Bolt&Nut with CE certifation