Crown Bolt 10810 1/4 Inch x 4-1/2 Inch Zinc-Plated Steel Hex-Head Lag Screws, 50-Count Zinc-plated 1/4 inch x 4-1/2 inch hex head lag screw For wood applications 1/4 inch body diameter and thread pitch 4-1/2-inch fastener length Zinc-plated finish