Double countersunk reduces the likelihood of head shear and assists completion of countersinking.<br />40° deep single thread to provide a secure fixing with high pull-out resistance.<br />Single slash on 25mm+ to reduce torque and the likelihood of the timber splitting when the screw is inserted close to the edge.<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: 40<br />Thread Length mm: 35<br />Size mm: 3.5 x 40<br />Pack Quantity Unit: Pieces<br />Recess Type: Pozi<br />Head Dia. mm: 6.68<br />Substrates: Hardwood, Softwood, Chipboard, MDF, Plastic, Thin Sheet Metal, Corrosive Wood (e.g. Oak, Cedar)<br />Gauge: 6<br />Salt Spray Resistance BS EN 9227 Hrs: 1,008 +<br />Corrosion Rating: 4 - Urban; industrial areas with a moderate salt atmosphere<br />Length inch: 1<br />Driver Bit Size: PZ2<br />Thread Type: Single Coarse 40°<br />Point Type: 25° Sharp with Single Slash<br />Size imp.: 6 x 1">