Product Info Catalog Hardware Fasteners Nails Pressure Treated Lumber Nails, Ring-Shank, 16D, 3.5-In., 50-Lbs. Pressure Treated Lumber Nails, Ring-Shank, 16D, 3.5-In., 50-Lbs. Request a Quote UPC: 98342025027 SKU: 594416 Model Number: T4491A-50 50lb 16d 3-1/2" double dipped ring shank pressure treated lumber nail. Double hot-dip galvanized nails are recommended by wood treaters