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.
| Id | 219649 |
| SKU | 7212418 |
| PartNo | 01105 |
| UPC | 737743205101 |
| Thread Size | #9 |
| Length | 3-1/8 In |
| Thread Type | W-Cut |
| Head Type | Flat |
| Drive Type | Star |
| Point Type | Zip-Tip |
| Material | Steel |
| Package Quantity | 425 PK |
| Thread Length | 2.087 In |
| Drive Size | T25 |
| Applicable Materials | Cement Fiber Board, Melamine, Particle Board, Plastic, Sheet Metal, Wood |
| CID | 9 |
R.P. Lumber - Edwardsville, IL