Hex Head Lag Screw Material 18-8 Stainless Steel Finish Plain Screw Size 1/4 in Fastener Length 4 in Thread Style Partially Threaded Dimensional Standards ASME B18.2.1 Pack Size Small System of Measurement Inch Drive External Hex Drive Size 7/16 in Head Height 0.172 in Head Style Hex Head Width 0.26 in Package Quantity 25