The Hillman Fasteners Power Pro Blue Flat Head Concrete Screw (MPN: 376528) is a 3/16 inch diameter by 4 inch long fastener designed for anchoring into masonry materials such as concrete, brick, and block. Constructed from heat-treated carbon steel, these screws feature a corrosion-resistant blue epoxy or Xylan coating, often referred to as Perma-Seal, for enhanced durability and performance in both interior and exterior applications. The flat head allows for a flush, countersunk finish, while the Phillips drive type facilitates installation. Power Pro Blue concrete screws are characterized by their high-low chiseled threads, which tap into masonry to reduce installation torque and provide strong holding power. Installation typically requires a 5/32 inch pilot hole drilled into the base material. The Power Pro line of fasteners is generally associated with building code approvals for various applications.