Phillips Flat Head Masonry Screws - 3/16 inch Diameter Commonly used to anchor fixtures to brick, block or concrete Blue Climaseal Coating for Corrosion Resistance & Durability Cuts its own threads into concrete and other masonry materials Does not include masonry bit A Phillips Flat Head Concrete Screw, also known as a masonry screw, features a blue climaseal coating and are ideal for applications involving concrete, brick, or block. Masonry Screws are commonly referred to simply as "Tapcons".