1/4"-15 x 1-3/4" Flat Head 6-Lobe SECURE-CON Tamper-Resistant Concrete Security Screws, Case Hardened Carbon Steel with Tanner Guard Corrosion Coating, Driver Size: 27TXH

SECURE-CON 6-Lobe Tamper-Resistant Masonry Screws are the optimal fastening solution, combining the security feature of a 6-Lobe tamper-resistant drive with the superior quality and easy installation of a masonry screw. Designed for applications in concrete, brick, or hollow block. The special Hi-Lo thread literally taps threads into masonry materials. The high, sharp thread with its notched cutting edge cuts deeply and easily. The alternating low thread provides stability for fast, accurate driving. The screws are coated with Tanner Guard finish to provide superior corrosion resistance.