Self tapping screws are coated with unique anti-corrosion coating consisting of 3 distinct layers which combine to give exceptional Corrosion protection.
1. A mechanically deposited Zinc-Tin coating giving excellent galvanic protection.
2. A chromate coating to passivate Zinc - Tin alloy coating further inhibiting coating loss and prevent weathering effect.
3. A special polyester coating (3 layers) to provide good all - round corrosion and long term weathering resistance.