GRK R4 Multi Purpose Framing Screws

The R4 Multi-Purpose fastener is designed to countersink into the widest possible variety of materials,  from brittle composites to the hardest wood.  It does this by means of its patented underhead cutting teeth and six self-contained cutting pockets.  Together they act similar to a circular saw blade, transporting the drill dust away from the edge of the screw hole and sealing the hole off without cracking the surface treatment of the material.  An added feature of all 2" and longer variants is the 4-thread CEE Thread, which enlarges the screw hole at out set for the non-threaded portion of the fastener increasing the screw's draw strength and reducing friction on the screw shank.  The result is a perfectly sunk screw, with no pre-drilling required, no stripped screw heads, and a clean finished surface.

All GRK Fasteners feature Climatek all weather coating the premier corrosion protection coating orginally designed for the U.S. Navy.  Climatek is primarily gold to match most wood finishes but is available in a range of colors for some products.  Climatek exceeds the standards for AC257 and conforms to ICC Reports ESR-2442 and ESR-3201.

Features & Benefits:

• Recessed Star Drive:  Zero Stripping, 6 points of contact
• Cee Thread:  Enlarges hole to reduce splitting
• W-Cut:  Low torque, smoother drive
• Zip-Tip:  No pre-drilling, faster penetration
• Cutting Pockets:  Provide a clean hole, reduces splitting, and bore with precision
• Case Hardened Steel:  For high tensile, torque and shear strength
• Multi-Use: Particle Board, Cement Fiberboard, Plastic, Hard Woods, and Sheet Metal
• Climatek coated: For interior / exterior use in wood, plastic, cement fiber board, sheet metal, wood decking and melamine
• ICC Approved: For Structural & Corrosion in ICC Report ESR-3201