Crown Bolt 88810 5/8 Inch x 8 Inch Hex-Head Hot Dipped Galvanized Coarse Thread Lag Screws, 10-Count Galvanized 5/8 inch x 8 inch lag screws hex head For wood applications 5/8 inch body diameter and thread pitch 8-inch fastener length Galvanized finish with Rust-Oleum certified rust protection