FastenMaster Ledgerlok 5 in. Structure Screw, 50-Count is a code-compliant structural wood screw designed specifically to fasten a deck ledger board to the rim joist of a house without the need for predrilling. This innovative screw replaces traditional lag screws and through-bolts, ing a more efficient and reliable fastening solution. It features a proprietary three-step coating process that protects against corrosion, even in pressure-treated wood, and is for use with ACQ-treated lumber. The built-in washer head eliminates the need for an additional washer, saving both time and money during installation. Additionally, the large hex-head design allows for greater bit engagement, reducing the risk of cam-out. Ledgerlok is supported by engineering data that meets the most current ICC standards, ensuring a strong and code-compliant connection for your deck construction needs. Model Number: