FastenMaster Ledgerlok 3-5/8 in. Structure Screw, 50-Count is a code-compliant structural wood screw designed specifically for fastening deck ledger boards to the rim joist of a house without the need for predrilling. This innovative screw serves as a reliable for lag screws and through-bolts, featuring a proprietary three-step coating process that superior corrosion resistance, even in pressure-treated wood. for use with ACQ-treated lumber, LedgerLOK ensures durability and long-lasting performance. The built-in washer head eliminates the need for an additional washer, saving both time and money during installation. Its large hex-head design allows for greater bit engagement, reducing the risk of cam-out and making the fastening process smoother and more efficient. Tested and supported by engineering data that meets the latest ICC standards, LedgerLOK delivers a code-compliant connection that professionals trust for structural integrity. Model Number: