Simpson 8d x 2-3/8" 15° Wire Coil, Full Round Head, Ring-Shank Nail 304 SS 12 Ga. 3600PkModel No. S12A237PNB Coating Material. Type 304 Stainless Steel Gauge. 12 Penny size. 8d Length (in.) 2 3 8 Head Diameter (in.) 1 4 Shank Diameter (in.) 0. 113 Shank Type. Annular Ring Shank Head Type. Full Round Head Head Pattern. Checkered Point Type. Diamond Point Packaging Qty. 3600 These framing nails feature an annular ring shank that increases withdrawal resistance to provide a secure attachment. Key Features Checker pattern on head blends with