1.High Strength Hub Bolt for Trailer and Truck 2.Material: 45#(SAE1045)/40Cr(SAR5140)/35Crmo(SAE4135) 3. Grade: 8.8,10.9,12.9 High Strength Hub Bolt for Mercedes Benz1. Material: 45(SAE1045)/40Cr(SAR5140)/35Crmo(SAE4135)2.Quality Grade: 8.8,10.9,12.9grade3.Surface: Galvanized(Yellow/Silver), Phosphated, Dacromet4.We can make products strictly according to customers' requirement(drawings or ...