GRK Fasteners R4 Multipurpose Screw #10 x 3-1/2" ProPak

Upgrade your next woodworking or construction project with the GRK R4 ProPak Multipurpose Screws. Engineered for versatility, these #10 x 3-1/2" fasteners combine speed, strength, and corrosion resistance in a convenient 300-piece pack. Whether you’re framing interior walls, building outdoor structures or installing decking, the innovative features of the R4 deliver clean countersinking, fast starts and maximum holding power—no pre-drilling required.

With a precision Torx™ drive and a bugle-style head that seats flush without splitting, these screws make installation faster and more reliable. The combination of the Zip-Tip™ and W-Cut™ thread design ensures a low-torque drive and superior performance in wood, composite and sheet materials. Plus, the exclusive Climatek™ finish protects against corrosion in treated lumber and harsh outdoor conditions.

Key Features

• Self-Countersinking Bugle Head
• Zip-Tip™ Fast-Bite Tip for one-step starts
• W-Cut™ Thread Design for low-torque driving
• Climatek™ Corrosion-Resistant Coating
• Torx™ Star Drive for reduced cam-out and wobble
• Fully Threaded Shank for maximum grip
• Ideal for wood-to-wood framing, decking and general construction