... of U-Bolt, wheel bolt & nut with different styles and sizes.1>.Material: 40Cr, 45# Steel, 35CrMo steel2>.Surface: Z.P ... . Black, Hot Dip, Plating, Phosphating, Oxide Painting, bake paint etc.3>.Size: M10 ~ M364>.Grade: 4.8, 8.8 ... quality, Competitive price, Fast delivery, Best service We can produce all kinds of bolts according to your requirements. Grade 10.9 ...