Simpson Strong Tie HU24TF 2-Inch by 4-Inch Top Flange Face Mount Joist Hanger "U" design allows for flexibility of placement on the header Joist size: 2x4 Made from 12 gauge steel Galvanized for extra corrosion resistance Install with 16d common nails in the header and 10dx1-1/2 in. nails in the joist