Hex Head Lag Screw Material Steel Finish Zinc Plated Screw Size 1/4 in Fastener Length 2 1/2 in Threads per Inch 10 Thread Style Partially Threaded Minimum Thread Length 1 1/2 in 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 100