Our zinc plated steel screws may look ordinary, but they’re made from one of the world’s strongest materials, steel, with a coating of zinc-chromate, along with a thin layer of clear, rust-resistant finish. They are highly resistant to both corrosion and water damage. In fact, when tested in a moisture chamber with a 5% salt spray solution, they were rated to withstand a wet environment for at least 500 hours. Compare that to the 100 hours ordinary zinc plated screws withstand before red rust appears, and you’ll know why our zinc plated steel screws are the superior choice.