Used for securing fibre cement profile sheets to timber. Complete with heavy duty EPDM and stainless steel washer to provide a water-tight seal. Also known as a BAZ washer. Exterior corrosion resistant coating to withstand over 500 hours salt spray. Exterior plating gives a reliable and durable corrosion resistant coating which resists 500 hours salt-spray Wings ream enlarged hole in roofing sheet to allow for expansion Frequently used to secure Big 6 roofing sheets" Thread Dia. mm: 6.3 Length mm: 130 Head Type: Hex Fixed Washer Dia. mm: 12.00 Point Type: Single Slash Socket Size mm: 8 Finish: Exterior (Silver Organic) Material: Case & Core Hardened Carbon Steel Effective Thread Length mm: 60 Max Drilling Thickness mm: N/ASize 6.3 x 130 - 50 pcs Timco Metal Fibre Cement Board Screws - Hex - BAZ Washer - Slash Point in Silver