GRKs R4 Self Countersinking screw has 6-self-contained cutting pockets which act like a router and transport the drill dust away from the edge of the screw hole. They also widen the countersink hole only around the head shape. The screw head top closes the hole exactly, leaving no damaged fibers around the wider area of the head.
| Screw Length | 2-1/2 in |
|---|---|
| Thread Pitch | 0 |
| Color Family | Yellow |
| Drive Style | Star |
| Fastener Plating | Polymer |
| Fastener Type | Wood Screw |
| Fastener/Connector Material | Steel |
| Features | ACQ Rated,Coated,Self Drilling,Self Tapping |
| Finish | Climatek coated |
| Finish Family | Zinc |
| Head Style | Bugle Head |
| Included | Driver Bit |
| Interior/Exterior | Exterior,Interior |
| Measurement Standard | SAE |
| Package Quantity | 300 |
| Product Weight (lb.) | 0.01lb |
| Returnable | 90-Day |
| Size | #9 |
| Manufacturer Warranty | No |