Timco - Metal Light Section Screws Hex Self-Drilling Silver Size 5.5x70-100 Pcs Hex head self-drilling screws, for joining roofing sheets to light section steel (Max. 5.0mm) without the need to pre-drill a hole. Exterior plating gives a reliable and durable corrosion resistant coating which resists 500 hours salt-spray Fire Classification - A1" Thread Dia. mm - 5.5 Length mm - 70 Head Type - Hex Fixed Washer Dia. mm - 12.00 Point Type - Self-Drilling No.3 Socket Size mm - 8 Finish - Exterior (Silver Organic) Material - Case & Core Hardened Carbon Steel Effective Thread Length mm - 58 Max Drilling Thickness mm - 5.0
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