GRK's R4™ self-countersinking screw has a patented underhead with saw-blade like 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 while cutting a perfectly clean hole into even the most brittle materials without cracking any surface treatment. This design enhances the R4™’s versatility by allowing the fastener to countersink into even the hardest woods. The screw head closes the hole off with precision, leaving no damaged fibers around the head.
|Stock code||Upc code||Size||Pieces||Weight (lbs)|
|000077269126073||772691 26073 4||8X1"1/2||1pail=857screws||4.16|
|000077269126099||772691 26099 4||9X2"||1pail=609screws||4.71|
|000077269126133||772691 26133 5||10X2"1/2||1pail=425screws||4.77|
|000077269126135||772691 26135 9||10X2"3/4||1pail=350screws||4.64|
|000077269126137||772691 26137 3||10X3"1/8||1pail=305screws||4.51|