Minerallac Tapcon Concrete Screw, Slotted Drive, 3/16 in Diameter, 2-1/4 in Overall Length, Hex Washer Head Drive, Steel, 5/32 x 4-1/2 in Drill, Blue Climaseal Coated, Applicable Materials: Concrete/Block/Brick, Patented Advance Threadform Thread, 0.152 in H x 0.249 in W Head