GRK Fasteners RSS Structural Screw 5/16" x 5-1/8" Handy Pack

Engineered for professionals and serious DIYers, the GRK Fasteners RSS Structural Screw delivers unmatched holding power in both interior and exterior applications. Its innovative Zip-Tip point and W-Cut thread design drive quickly into most woods without pre-drilling, while the recessed six-point star drive minimizes stripping and maximizes torque transfer. Backed by a corrosion-resistant Climacoat finish (AC257 code-approved), these screws stand up to intermittent moisture and treated lumber, making them ideal for decks, beams, ledger boards, stair rails, playground equipment and more.

Made from case-hardened steel, each screw boasts high tensile and shear strengths that outperform conventional lag screws with less driving effort. The built-in washer-type head provides immense bearing surface and self-centering on connector plates, and every handy pack includes a T25 driver bit to ensure the perfect fit. Trust GRK’s ICC-tested RSS Structural Screws for reliable, code-approved connections in demanding structural projects.

Key Features

• Zip-Tip point for no-pre-drill installation and fast penetration
• W-Cut thread reduces driving torque and minimizes splitting
• Recessed six-point star drive (T25) for zero stripping and maximum torque
• Washer-type head with built-in bearing surface for superior holding power
• Case-hardened steel construction for high tensile (4,247 lbf) and shear (2,948 lbf) strength
• Corrosion-resistant Climacoat finish (AC257) approved for treated lumber and intermittent moisture
• Self-tapping design, ICC-tested per ESR-2442
• Includes T25 driver bit; 20 screws per handy pack