3/8 x 4-1/2 Hex Lag Screws - Galvanized Box/50

Overview

The 3/8 x 4-1/2 Hex Lag Screws - Galvanized Box/50 (05584) is designed for heavy-duty fastening applications in timber construction, wood-to-masonry, and wood-to-concrete installations.

Technical Features

• Hexagonal head drive: Accepts a wrench or socket for high-torque installation, enabling secure seating into dense timber and masonry substrates.
• 3/8 in. diameter x 4-1/2 in. length: Provides substantial thread engagement depth for fastening heavy structural members where pull-out resistance is critical.
• Galvanized finish: Corrosion-resistant coating extends fastener service life in exterior, high-moisture, and treated-lumber environments.
• Wood-screw thread form at larger scale: Aggressive threading pattern designed specifically to grip wood fibers and resist withdrawal forces in structural assemblies.
• Box of 50 units: Packaged in job-site quantities to support volume fastening tasks without repeated restocking.

Applications

• Fastening heavy timbers to one another in framing and structural carpentry.
• Securing wood members to masonry or concrete substrates such as ledger boards, sill plates, and anchor connections.
• Deck framing and outdoor structural assemblies where corrosion resistance is required.
• Pergola, fence post, and heavy timber joinery applications demanding reliable load-bearing connections.