1) Product name: wheel nut2) Materials: carbon steel1035, 45#, 40cr, 42crmo etc.3) Size: M6-M22,All size could to be produced as customer need.4) Grade: 8.8, 10.9, 12.9 etc.5) Surface treatment:Chrome plated,ZINC, Protective oil (black or clear),decorate6) Certificate: ISO9001-2000, ISO9001-20087)...