Crown Bolt 86440 5/8 Inch x 10 Inch Hex-Head Hot Dipped Galvanized Coarse Thread Lag Screws, 10-Count Galvanized 5/8 inch x 10 inch lag screws hex head For wood applications 5/8 inch body diameter and thread pitch 10-inch fastener length Galvanized finish with Rust-Oleum certified rust protection