The Hillman Power Pro Blue Flat Head Concrete Screw Anchor, MPN 376522, is designed for securing materials into concrete, masonry, brick, hollow block, and AC257 treated lumber. Constructed from heat-treated carbon steel, this anchor features a blue epoxy coating that provides multi-layer corrosion protection, exceeding 1,500 hours of salt spray testing. Its flat head includes under-head micro-nibs for clean countersinking in wood applications, and it utilizes a T25 star drive for stable, no-strip installation. The screw incorporates wide, serrated hi-low threads that cut quickly and cleanly into hard substrates, with threading extending to the tip for rapid penetration. Installation typically requires a 5/32" drill bit. This concrete screw anchor carries various building code approvals, including ICC ES ratings for concrete and masonry, as well as California, Florida, and Miami-Dade County approvals.