Roofing Screws. Steel to Steel (For Light Section Purlins)
Washered Self-Driller. Steel Sheet to Steel Purlin.
Head: Hexagon Self-Drilling.
Finish: New 'Elementech' coating for superior anti-corrosion - salt spray tested to 1000 hours.

-TechFast screws for light section purlins will fix material to purlins between 1.2mm to 3.6mm.
-The 16mm rubber washer beneath the aluminium flange expands under pressure and forms a permanent weather-seal.
-Designed for fixing cladding and sheet metal to light and heavy structural purlins as used when constructing industrial units.