D-bolts with nuts for BENZ heavy truck 1.Material:40 Cr 2.Grade:10.9 3.Surface Treatment:Galvanized 4.Good Hardness CHANG ... Plating-Packing-Warehousing 1.Products: rear,front wheel bolts,stainless steel U-bolts,center bolts for kinds of big brand heavy duty ... 1045),40Cr(SAE 5140),35CrMo(SAE 4135). 5.Surface Protection: Black oxide,Protective oil,Phosphated,Zinc plated,Dacromet, Bake painting,Polishing ...