5/16" x 16" Powerlags Interior Pancake Head Structural Wood Lag Screws (250 pcs) T40 T-Star Heavy Duty

★★★★★ 4.9 149 reviews

$379.98
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Management number 215618490 Release Date 2026/04/12 List Price $151.99 Model Number 215618490
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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.

  • 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 16" inch screws along with 1 high-quality T40 Torx T-Star bits, providing everything you need for efficient and reliable installation.
UPC 712216021563
Brand SPAX
Color Black
Head Type Flat
Size Name 5/16" x 16"
Metal Type Carbon Steel
Unit Count 250.0 Count
Part Number 3601770804000
Thread Size 5/16
Thread Type Serrated Thread
Drive System Star
Manufacturer SPAX
Thread Class 3A
Thread Style Right Hand
Fastener Size 16"
Fastener Type Wood Screws
Material Type Carbon Steel
Exterior Finish Black E-Coat
Thread Coverage Partially Threaded
Number of Pieces 250
Screw Head Style Pancake
Screw Point Style Self-Tapping
Compatible Groove Diameter 0.31 Inches

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4.9 out of 5
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