Deep recess to prevent 'cam-out', giving a precise and positive drive control on every screw.<br />Ribs under head for improved countersinking and to give a smooth and flush finish, also prevents splitting and material damage.<br />Coated with a high-molecular polymer lubricant that reduces the insertion torque by up to 52% and increases rust protection up to 20 times longer than a standard zinc plating.<br />Dual angle thread gives an ultimate performance and an exceptionally high pull-out resistance.<br />Patented twin cut technology for rapid "pick-up" and reduces timber splitting.<br />All sizes up to and including 75mm are fully threaded and lengths 80mm and above all have 70mm thread length<br /><br />TECHNICAL DATA:<br />Thread Dia. mm: 3.5<br />Length mm: 30<br />Thread Length mm: 25<br />Size mm: 3.5 x 30<br />Pack Quantity Unit: Pieces<br />Recess Type: Pozi<br />Head Dia. mm: 6.6<br />Substrates: Hardwood, Softwood, Chipboard, MDF, Plastic, Thin Sheet Metal<br />Gauge: 6<br />Lubrication: Gleitmo<br />Salt Spray Resistance BS EN 9227 Hrs: 600<br />Corrosion Rating: 2 - Occasionally damp/wet, rural and sheltered areas<br />Length inch: 1<br />Driver Bit Size: PZ2<br />Thread Type: 40° Single<br />Point Type: Twin-Cut">