Hot galvanized screw shank nail. Increased holding power means a smaller diameter nail which reduces chances of splitting wood. Use in treated lumber projects. Flat countersunk head and blunt point. No. 16HGSTPDBK: Size: 16d Length: 3-1/2 In. Finish: Hot Dipped Galvanized Diameter: 9 ga Head Diameter: 5/16 In. Shank Type: Spiral Head Type: Flat Countersunk Point Type: Blunt Package Size: 30 Lb. Pkg Qty: 1560 Package Type: Pail Prop. 65 Warning for California Residents: This product may contain chemicals known to the State of California to cause cancer birth defects or other reproductive harm.