Overview Reviews Product Description Ideal for concrete, brick or hollow block. Using the correct bit, drill hole in masonry to depth of at least 1/4" deeper than installed screw. Papco Screws Catalog Product Videos Custom Field Box quantity 100 Plating Blue epoxy Diameter 3/16" Length 3-1/4" Bit type Nut driver/flat Product Reviews Write a Review Write a Review × Paulin 3/16" x 3-1/4" Hex Head Steel Concrete Screw 100 Pc. 537-824 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *