Hex Head Lag Screw, Material Steel, Finish Zinc Plated, Screw Size 1/4 In., Fastener Length 4 in, Threads per Inch 10, Thread Style Partially Threaded, Minimum Thread Length 2 13/32 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