Hex Head Lag Screw, Material 18-8 Stainless Steel, Finish Plain, Screw Size 5/16 In., Fastener Length 1 1/2 in, Thread Style Partially Threaded, Dimensional Standards ASME B18.2.1, Pack Size Bulk, System of Measurement Inch, Drive External Hex, Drive Size 1/2 in, Head Height 0.219 in, Head Style Hex, Head Width 0.324 in, Package Quantity 700