... .surface:zinc plated,phosphoted... 3.size:M8-M42 4.grade:8.8,10.9 wheel nut, tire nut, hex flange nut, wheel ... .surface:zinc plated, black oxided,phosphated3.size:M8-M424.grade:8.8,10.9,12.9Satisfactory services:We can produce hex nuts ... your design.Other services can be consulted in dealing. grade 8.8 , 10.9 wheel nut