Simpson Strong Tie T10PTD5 10D Preservative-Treated Wood Decking Nails, 3-Inch and 10-Gauge, Stainless Steel, 5-Pound, 395-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 Annular Ring Shank increases pull-out resisitance Choose 316 Stainless Steel for seaside applications