The GRK RSS (Rugged Structural Screw) is an ICC-ES code-approved lag screw alternative that installs faster with no pre-drilling required. The Climatek coating provides corrosion resistance for both interior and exterior structural applications such as ledger boards, beam connections, multi-ply framing, and stair stringers.

• Size: 5/16" x 5-1/8"
• T-30 Star drive recess for zero-strip performance
• W-Cut threads reduce torque for fast, easy driving
• Zip-Tip eliminates the need for pre-drilling in most softwoods
• Integrated washer head provides a flush bearing surface
• Climatek coating for indoor/outdoor corrosion resistance
• ICC-ES ESR-2442 approved for structural applications
• Lag screw replacement for heavy-duty framing
• 25 screws per box