Floorboard Screws with Wings, 5lb Box, Approx. 141 Pieces - 1/4" x 3-1/2" Metal Self-Tapping Screws, Heat, Abrasion, & Corrosion Resistant Screws for Flooring, Construction

AVOID CAM-OUT: The star-drive design of these floorboard screws maximizes torque & reduces cam-out, protects the fastener & bit UNMATCHED STRENGTH: Floorboard screws are made with alloy steel and case-hardened to reduce breaking. The coating is resistant to heat and abrasion. WINGS & SELF-DRILLING TIP: Wings bore through the wood decking before snapping off to allow the self-drilling tip to drill through the steel substrate. ONE STEP INSTALLATION: One self-tapping decking screw drills through wood decking and metal substrate for a fast, strong connectionYou may also like SK20920 Helical Threaded Insert Kit, 304 Stainless Steel, 5/16"-18 Thread Size, 0.625" Installed Length (Pack of 10)$$Hardware.