bolts 1)material:mild steel,45# steel,40Cr steel 2)surface: ... .9 bolt m12x1.5, centre bolt 10.9, hex centre bolts with nutCertificate: ISO9001:2000High Quality Strengthen: Grade 10.9, 12 ... carton box fastened with palletSatisfactory services:We can produce wheel bolts as per your drawing and/samples.We can supply package ... have any questions, please feel free to contact me. centre bolts