Simpson 2d - 1" Shake and Shingle Siding/Roofing Nail, 304 Stainless Steel 25LbModel No. S2SNDB Coating Material. Type 304 Stainless Steel Gauge. 14 Penny size. 2d Length (in.) 1 Head Diameter (in.) 2 9 Shank Diameter (in.) 0. 083 Shank Type. Annular Ring Shank Head Type. Full Round Head Head Pattern. Checkered Point Type. Diamond Point Approx. Count. 25 Lb (13250) The Shake and Shingle Siding Roofing nail's 7 32" diameter flat head provides ample bearing surface to secure all types of shakes and shingles. This screw also