Perfect for Roofing, Decking, and Framing Projects! Upgrade your construction projects with our 8" Structural Timber Screws (also known as wood lock screws), designed for versatile applications like securing rafters, trusses, headers, and stair stringers. These heavy-duty screws replace 3/8-inch lag bolts, eliminating the need for pre-drilling in most cases and significantly reducing installation time. Featuring a sharp point and aggressive coarse threads, they easily penetrate dense wood, while the tapered head allows for seamless countersinking. Installation is quick and easy with just a 5/16" hex bit, making these hex head timber screws a reliable choice for any project. Please Note* Meets the latest ICC standards (ICC-ES ESR-1078) Approved for use in ACQ or treated lumber 6 inch size available Specs Screw Length: 8" Size: 3/16" Thread Length: 2" Washer Diameter: 15/32" Material: Carbon Steel Plating: Electro Galvanized Zinc Type: Structural Screws Interior/Exterior: Interior/Exterior Drive Type: hex Thread Type: Coarse Thread Pitch: 3 mm Threads Per Inch (TPI): 12 Features Great For A Variety of Applications: Ideal for interior or exterior jobs, these screws work great for attaching rafters/trusses to the top plate, headers, stair stringers, landscaping timbers, & MORE! Faster & Easier Installation: Eliminate pre-drilling and speed up projects by replacing 3/8" lag bolts and even hurricane straps in a Rafter/Truss to Plate application with these strong, versatile screws. Superior Holding Strength: 2 inch thread length of aggressive coarse threads provide exceptional holding power for dense and treated woods. Tapered Countersinking Head: Ensures smooth and flush installation without additional effort (washer head diameter: 15/32") Easy to Use: Sharp point Installs effortlessly with a 5/16" hex bit, simplifying any project. Compatible with ACQ or Pressure Treated Lumber: Screws are finished with an Electro Galvanized Zinc coating, ideal for interior or exterior applications. Meets the latest ICC standards (ICC-ES ESR-1078) Sandbaggy Screws and Fasteners Sandbaggy delivers professional-grade screws and fasteners engineered for strength, durability, and reliable performance on real job sites. Built tough for construction, concrete, and industrial use—our hardware is made to hold when it matters most. FAQ What size hex bit do you install these with? You'll need a 5/16" hex bit to install these screws. Pre-drilling is usually not needed, but if you do need to pre-drill, a 3/16" pilot hole is recommended. Are these timber screws compatible with pressure treated lumber? Yes, these timber screws are finished with an Electro Galvanized Zinc coating, making them compatible with ACQ or Pressure Treated Lumber.
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