Simpson 2" x 6d Annular Ring Shank Common Nail, 304 Stainless Steel 10 Ga. 25lbModel No. S610ACNB Coating Material. Type 304 Stainless Steel Gauge. 10 Penny size. 6d Length (in.) 2 Head Diameter (in.) 2 7 Shank Diameter (in.) 0. 131 Shank Type. Annular Ring Shank Head Type. Full Round Head Point Type. Diamond Point Approx. Count. 25 Lb (3125) Simpson Annular Ring Shank Common Nails, are made with type 316 and type 304 stainless steel. The annular ring shank increases the withdrawal resistance to give the application a secure