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The HILLMAN FASTENERS 47869 is a 30-pack of Power Pro Bronze Ceramic Construction Lag screws engineered for demanding outdoor and structural fastening applications. Each screw measures 3 inches in length by 5/16 inches in diameter and features a Type 17 cut point for clean starts in wood without pre-drilling. The star drive head and coarse serrated thread profile deliver high pull-out resistance in treated lumber, composite materials, and heavy timber framing. The bronze ceramic coating is tested to 1500 hours of salt spray resistance, making these lags a reliable choice for coastal, pressure-treated lumber, and high-moisture environments. Licensed contractors, framers, and deck builders are the primary installers.
These construction lag screws are suited for residential and light commercial structural connections including deck ledger attachments, beam-to-post connections, joist hangers, and exterior framing. The 1500-hour salt spray rating makes them appropriate where ACQ, CA, or other corrosive preservative-treated lumber is specified by code. The Type 17 cut point reduces splitting in dense or dry lumber, which is especially useful in close-to-edge fastening situations common in deck and pergola construction.
Designed as a structural lag fastener for use with pressure-treated lumber, ACQ-treated wood, and standard dimensional lumber in exterior framing and decking applications.
Installation is performed by carpenters, framers, and licensed contractors using a star-bit driver or impact driver. Always pilot-drill the appropriate clearance and lead holes per the applicable building code before driving lags into dense or engineered lumber to prevent splitting. Consult local building codes and the International Residential Code for required fastener schedules in structural connections. Follow lumber manufacturer guidelines when fastening into preservative-treated wood to confirm coating compatibility.
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