... .material:mild steel,45#steel,40Cr 2.surface:zinc plated, black oxide.. 3.grade:8.8,10.9,12.9 auto high tensile fastener, truck ... /10.9 high tensile fasteners, u bolt wheel bolt Certificate: ISO9001:2000High quality strengthen: Grade 8.8, 10.9Material: mild steel, 45# steel, 40Cr, 35 ... services:We can produce U bolts as per your drawing and/samples.We can supply package by your design.Other services ...