Description • • 2 packs of Techfast hex-head roofing screw each packs as 50 screws size 5.5mm + 60mm long sealed pack of 50 screws Self drill light section Designed for fixing cladding and sheet steel to light section steel purlins of between 1.2mm and 3.6mm The screws have a hex-head, 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 1000 hours
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