Ace Trading - Screws 19100ACE Phillips Flat Head Masonry Screws 3/16"x1-1/4" ACE MASONRY SCREWS *3/16" x 1-1/4" *Phillips *Pan head *Cuts own threads into concrete brick or block *Meets all building codes excellent pullout and shear strength *Recommend using a concrete drill bit for pre-drilling holes *Use 5/3"ACE" MASONRY SCREWS *3/16" x 1-1/4" *Phillips *Pan head