Forgefix TechFast Hex Head Roofing Screw Self-Drill Heavy Section 5.5 x 51mm Pack 100 FORTFHH5551
These Forgefix TechFast Hex Head Roofing Screws are designed for fixing cladding and sheet steel to heavy section steel purlins of between 6.0mm and 12.5mm. The screws have a hex head, are self-drilling and have a rubber washer which expands under pressure to form a permanent weather seal. They are zinc plated and have an 'Elementech' coating for superior corrosion resistance, which has been salt spray tested to 1,000 hours.