Simpson 8d x 2 1/2" 20° - 22° Collated Ring-Shank Nail, 304 Stainless Steel 10 Ga.Model No. S10A250CNB Coating Material. Type 304 Stainless Steel Gauge. 10 Penny size. 8d Length (in.) 2 1 2 Head Diameter (in.) 2 7 Shank Diameter (in.) 1 8 Shank Type. Annular Ring Shank Head Type. Full Round Head Head Pattern. Checkered Point Type. Diamond Point Packaging Qty. 4000 The 20 22 plastic strip, full round head, ring shank nail features a checker pattern on the head that blends with wood grain, reduces sunlight glare and accepts surface