Hex Head Lag Screws, Material 18-8 Stainless Steel, Finish Plain, 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 Bulk, 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 750