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SPAX 5/16' x 12' Interior Pancake Head Structural Wood Lag Screws Powerlags Torx T-Star (250 EA) Bulk Pail Bit Included Heavy Duty Log Home Timber Landscape

4.3 (1) Write Review
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$259.98

$ 99 .00 $99.00

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About this item

  • No Pre-Drilling Required: Ultra-sharp tip and patented serrated thread design allow for easy installation without pilot holes.
  • 40% Lower Driving Torque: Serrated threads near the tip cut a path for the remaining threads, reducing driving torque by 40%.
  • Maximum Strength: Made from high-quality, heat-treated carbon steel for superior holding power and virtually no chance of shear-off.
  • 6-Point Torx Star Drive: Spreads torque evenly, prevents cam-out and enables one-handed driving.
  • Each pack contains 250 pieces of 12" inch screws along with 1 high-quality T40 Torx T-Star bits, providing everything you need for efficient and reliable installation.


The ultimate fastening solution for heavy-duty wood to wood connection projects. Engineered for unparalleled strength, durability, and ease of use. Superior Clamping Power: The flat pancake head design delivers maximum clamping power and optimal load distribution, ensuring secure, tight connections for all your projects. The advanced 6-point T-STAR drive system evenly distributes torque, prevents cam-out, and allows for effortless one-handed driving, making installation faster and easier, even in tough materials. eCoat Protection for Long-Lasting Durability: Featuring an advanced eCoat finish for exceptional corrosion resistance. Whether you're working with treated lumber or traditional wood, these screws are built to withstand the elements and keep your structures intact for years to come. Razor-Sharp Tip and Patented Thread Design: With a razor-sharp tip and patented thread design, these screws eliminate the need for pre-drilling, saving you valuable time and effort. The serrated threads near the tip blaze a path for the remaining threads, reducing driving torque by an impressive 40% compared to conventional screws. Engineered for Heavy-Duty Applications: Manufactured in USA from premium heat-treated carbon steel, offer unparalleled strength and holding power, with virtually no risk of shear-off. These screws are perfect for demanding projects including decking, fencing, framing, log homes, mass timber framing, ledger boards, retaining walls, landscaping, farms and barns, SIP roofing systems, and more. These screws meet strict structural codes and provide the reliability you need. Key Features: T-Star flat pancake head for maximum clamping power and reduced cam-out. eCoat finish for superior corrosion resistance, ideal for interior or protected environments. Razor-sharp tip and patented thread design for no pre-drilling and 40% less driving torque. Heat-treated carbon steel for unmatched strength and durability.


Von C.
Reviewed in the United States on February 24, 2025
These are great screws. Better than Oly log screws .I’m using the 12” to secure 6x8’s in a log cabin build. Great pull down power but you better have a high torque drill! I’ve bought over 1,000 so far and wiil continue to use Spax brand