Hex Head Lag Screws, Finish Zinc Plated, Material Steel, Drive External Hex, Screw Size 1/4 In., Fastener Length 1 in, Head Width 0.438 in, Head Height 0.25 in, Threads per Inch 18, Minimum Thread Length 1 in, Pack Size Small, System of Measurement Inch, Head Type Hex, Point Type BSD, Application Wood Framing, Features One Piece Washer Head Design, Head Style Hex, Package Quantity 20