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