Simpson Strong Tie T4SN71 4D Shake and Shingle Siding/Roofing Nails 1-1/2-Inch and 14-Gauge, 316 Stainless Steel, 1-Pound, 394-Piece 7/32-inch head diameter and .083-inch shank diameter Slender Shanks minimize splitting Checker pattern on heads to blend with wood grain Annular ring shank increases pull-out resistance Choose type 316 for seaside applications and superior corrosion resistance