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 ideally clean hole into even the most brittle materials without cracking any surface treatment.
| Id | 202266 |
| SKU | 7212400 |
| PartNo | 01101 |
| UPC | 737743205088 |
| Thread Size | #9 |
| Length | 2-1/2 In |
| Thread Type | W-Cut |
| Head Type | Round |
| Drive Type | Star |
| Material | Steel |
| Finish | Climatek |
| Package Quantity | 575 |
| Type | Multi-Purpose |
| Thread Length | 1.57 In |
| Drive Size | T25 |
| Applicable Materials | Cement, Fiber Board, Melamine, Particle Board, Plastic, Sheet Metal, Wood |
| CID | 9 |
R.P. Lumber - Edwardsville, IL