Grip Rite 16HGC1 1 lb Hot Dipped Galvanized Smooth Shank Common Nail, 3-1/2" For construction, carpentry, and framing Galvanized coating and larger shank provide greater strength Approved for exterior use with all types of treated lumber All grip-rite hot dipped galvanized fasteners meet ASTM a-153 requirements and can be used with treated lumber