Evolution Black Phosphate Fine Thread Drywall Screw 75mm x 4.2mm (Pack of 500) – DWSP75

IMPORTANT APPLICATION ADVICE: On rare occasions black phosphate screw coatings can react with some render types, which can damage the coating resulting in corrosion and staining. To reduce the risk of this happening Evolution recommends sealing the drywall screw heads with a PVA bonding solution before render is applied. Specification: Length: 75mm Thickness: 4.2mm Box Quantity: 500 Material: Metal Type: Self Drilling Tensile Strength: 6.5kN Shear Strength: 4.4kN Surface Hardness: 540.0HV Core Hardness: 480.0HV Ultimate Tensile: ISO 6892-1: 2009 Ultimate Shear: MIL-STD-1312-13 Pull Out (Withdrawal Force): EN 14566: 2009 Pull Over: EN 14592: 2008 Hardness: ISO 650 7-1: 2005 Corrosion Resistance: EN ISO 9227: 2012 Drilling Time Test: EN 14566: 2009 EN 1363-1: Pass EN 1364-1: Pass Effective Thread Length: 50mm