GRK R4 Multi Purpose Torx Screws
The GRK R4™ is a multi-purpose screw that can be used in all woodworking and plastic applications.
GRKs R4™ self-countersinking screw has a new under head with saw-blade like cutting teeth and six self-contained cutting pockets. Driving the R4 screw cuts a perfectly clean hole into even the most brittle materials without cracking any surface treatment. This allows the fastener to be installed without countersinking into even the hardest woods.
R4™ screws which are 2" and longer have a four threaded CEE thread that enlarges the screw hole for the non-threaded portion of the fastener. This allows the wood to settle easily and increases the screws drawing strength, reducing the friction on the screw shank and lowering the driving torque.
Because the head has a 90 degree angle at the underside, the R4™ screw fits perfectly into the pre-countersunk holes of hardware fittings such as hinges or locks. Stocking of different screws is no longer necessary because the R4™ is a very versatile screw.
The GRK R4™ is a perfect multi-use option for any of the following:
- Sheet Metal
- Cement Fiber Board
- Composite Decking
- Wood Decking
Shipped in Handi Packs, and include a Torx bit with each pack.
Note: Different sizes and quantities are available by special order, as are Stainless Steel R4 screws.
Please contact us if you are interested in different options that those listed here.