Simpson 6d x 2" Preservative-Treated Wood Decking Nail, 316 Stainless Steel 25LbModel No. T6PTDB Coating Material. Type 316 Stainless Steel Gauge. 11 Penny size. 6d Length (in.) 2 Head Diameter (in.) 2 7 Shank Diameter (in.) 0. 12 Shank Type. Annular Ring Shank Head Type. Full Round Head Head Pattern. Checkered Point Type. Diamond Point Approx. Count. 25 Lb (3600) The Preservative Treated Wood Decking Nail is designed for use in deck and dock projects and features a larger shank diameter allowing for easy installation into both