GRK Fasteners R4 Multipurpose Screw – #9 x 3-1/8″ (425-Count)

Elevate your next woodworking or construction project with the GRK Fasteners R4 Multipurpose Screw. Engineered for both interior and exterior applications, these star-drive screws combine patented cutting technologies to deliver fast starts, low-torque driving and a clean countersink every time. The proprietary Climatek™ coating ensures long-term corrosion resistance in pressure-treated lumber and harsh environments, while the CEE Thread design allows wood fibers to settle for superior holding power.

Whether you’re framing, fencing, decking or installing trim, these screws eliminate pre-drilling and minimize splitting, helping you work faster with less effort. The R4’s self-countersinking head and underhead cutting teeth create a precise recess, while the Zip-Tip™ point and W-Cut thread slice through any fibrous material for smooth, efficient installation.

Key Features

• Self-countersinking head with six underhead cutting pockets
• Zip-Tip™ point for instant bite and no pre-drilling
• W-Cut thread design provides low installation torque
• CEE Thread enlarges the unthreaded shank hole to reduce wood stress
• Climatek™ gold-tone coating for superior corrosion protection
• Multi-purpose: ideal for wood-to-wood framing, particle board, plastic, sheet metal, composite decking and more
• Available in PHEINOX™ stainless steel for added versatility