81PQFW\ Screw 8x1 Sq Pan WH/Z /lb

steel sheet metal screws are zinc plated to resist corrosion in wet environments. A #2 square recess head (Robertson) for a secure grip with a wrench and a flange to reduce the risk of crushing thin metal. They penetrate without a pilot hole in thinner sheet metal. Length is measured from under the flange. Head height includes the flange.