Finishes: Self colour, Zinc plated (with WhiteBlueYellow passivation), Hot Dip galvanised, Cadmium Plated, Blackened, Nickle plated and Chromium Plated.Mild steel Bolts and Screws conform to grades 4.6 and 4.8 and Nuts to grade 4. Higher grades of 5.6 and 5 are also arranged against order.