Simpson Strong Tie T8SND1 8D Cedar and Redwood Siding Nails 2-1/2-Inch and 13-Gauge, 316 Stainless Steel, 1-Pound, 196-Piece 5/32-inch head diameter and .095-inch shank diameter Ideal for decks and fences Checker pattern on heads to blend with wood grain Annular Ring Shank increases pull-out resistence Choose 316 Stainless Steel for seaside applications