Self Drilling Construction Screws - 5.5 x 25
- Hexagon washer headed self drilling screws.
- Drills and fastens in one operation.
- High thread screws provide a secure fix through insulation.
- Use bonded isolation washers 10763 for waterproofing or to prevent bi-metallic corrosion when fixing a dissimilar metal (e.g. stainless steel).
- Use 5/16" socket 10761 to drive.