Product Info Catalog Hardware Fasteners Screws Masonry Screw, 3/16 x 3-1/4-In. Star Flat Head, 100-Pk. Masonry Screw, 3/16 x 3-1/4-In. Star Flat Head, 100-Pk. Request a Quote UPC: 738287512250 SKU: 192479 Model Number: 51225 Torquemaster, 100 pack, 3/16" x 3-1/4", star flat head masonry screw. Added Torque, reduces the risk of cam-out. Quick, this two step system installs quickly and provides a neat finish. Safe, no dangerous powder actuated tools needed. Removable, screws can be easily removed. Coating, features Blue Ruspert finish for rust resistance.