Simpson Strong Tie S10PTD1 10D Preservative-Treated Wood Decking Nails, 3-Inch and 10-Gauge, Stainless Steel, 1-Pound, 79-Piece 9/32-inch head diameter and .134-inch shank diameter Ideal for decks and docks Checker pattern on heads to blend with wood grain Annnular Ring Shank increases pull-out resisitance Choose 316 Stainless Steel for seaside applications