General description Timco's light section self-drilling screws are specifically designed for use with light section 5mm steel. These screws feature a hex head and a self-drilling tip, allowing for easy installation without the need to pre-drill holes. They are ideal for joining roofing sheets to light section steel. Technical specifications Size: 5.5 x 100mm Washer size: 16mm Quantity: 100 screws Material: Silver Ruspert plated for corrosion resistance Coating durability: Withstands over 1000 hours of salt spray testing Thread type: Coarse self-tapping thread Other information Designed and manufactured to meet recognized industry standards and performance criteria.