Tapcon  Concrete Screw Anchor  3/16 in. Di *Diameter: 1/4 in. *Length: 1-3/4 in. *Material: Steel *Head Style: Flat Head *Product Type: Concrete Screw Anchor *Number in Package: 225 pk *Thread Type: High/Low *Packaging Type: Boxed *Dimeter: 3/16 in. *Application: Concrete and Masonry, Concrete Anchor *Flat head* Phillips* These anchors are designed for fastening applications in concrete, block and brick* Common applications include attaching 2 ft. x 4 ft., electrical equipment, furring strips, flag holders, window/door frames, and hurricane shutters* Anchors feature a blue climaseal coating for corrosion resistance and a patented advanced threadform for superior pull-out performance