Simpson Strong-Tie® Screw anchor, series: Titen®, 1/4 in dia, 2-1/4 in OAL, Flat/Phillips® Head Drive, 410 Stainless Steel, 1 in Minimum Embedment Depth, 3/16 in Drill, Zinc Plated, Applicable Materials: Concrete and Masonry, 100 lb Shear Strength, 110 lb Tensile. Stainless Steel Titen® screws are ideal for attaching various types of components to concrete and masonry, such as fastening electrical boxes or light fixtures. They offer the versatility of our standard Titen screws with enhanced corrosion protection. Available in hex and Phillips flat head. Simpson Strong-Tie® TTN25214PFSS Screw Anchor, 1/4 in dia, 2-1/4 in OAL, Flat/Phillips® Head Drive, 410 SS