Timco's light section self-drilling screws are designed for light section 5mm steel, with a coarse self-tapping thread. They are plated with Silver Ruspert which is a reliable coating able to withstand over 1000 hours of salt spray testing. Specifically designed and manufactured to meet all the recognised industry standards and performance criteria. Hex head with a self-drilling tip Silver Ruspert plated for a durable corrosion resistant coating which can withstand over 1000 hours of salt-spray testing Designed for light sectional work Self-drilling screws for light section 5mm steel, with a coarse self-tapping thread.