GRK RSS™ Rugged Structural Screw – Lag Alternative for Strong, Fast Connections The GRK RSS™ Rugged Structural Screw is a high-performance structural fastener designed for easy installation and maximum strength. Engineered as a lag screw alternative, RSS Screws drive into most woods without pre-drilling, making them faster and easier to install than conventional lag screws while providing strong, reliable connections. Featuring a Fast Bite Tip for a quick start, Zip-Tip™ technology to eliminate pre-drilling, and W-Cut™ threads for low torque and rapid driving, these screws combine speed and strength for professional applications. The Precision Fit design reduces wobble between the screw and GRK bit, improving productivity, while the Star Drive recess provides six-point contact for zero stripping. With a Climatek™ corrosion-resistant coating, RSS Screws are code-approved for treated lumber and suitable for a variety of interior and exterior structural projects.



Size: *
  • 5/16" x 2-1/2" (100 Count)
  • 5/16" x 4" (100 Count)
  • #10 x 3-1/8" (50 Count)
  • 5/16" x 6" (20 Count)
  • 5/16" x 6" (50 Count)
  • 3/8" x 8" (50 Count or by the piece)
  • 3/8 x 10" (50 Count or by the piece)
  • 3/8" x 12" (50 Count or by the piece)

Learn More


  • Lag screw alternative for strong, structural connections

  • Drives into most woods without pre-drilling

  • Fast Bite Tip for quick starting

  • Zip-Tip™ technology eliminates pre-drilling

  • W-Cut™ threads for low torque, fast driving

  • Precision Fit reduces wobble with GRK bits for improved productivity

  • Star Drive recess provides zero stripping with 6-point contact

  • Climatek™ coating for interior/exterior use, approved for treated lumber

Related products