... :5140 Steel,35CrMo. 2.Application:Wheel hub bolt and nut. 3.ISO9001:2008. Mercedes Benz Vehicle Rear Hub Bolt Nut1). QUALITY: Grade 8.8 ... (Silver).Zinc phosphate + Protective Oil (Black / Grey);3). MODEL: BENZ REAR HUB BOLT & NUTBENZ, VOLVO, MAN, SCANIA, HINO, MACK, FUWA type is ...