Item # EC0TSUUPC: 772691010995



GRK R4 Multi-Purpose Screws are self-tapping with a countersinking head. They require no pre-drilling.

This self-countersinking screw has a new underhead with saw-blade like cutting teeth and six self-contained cutting pockets. This transports the drill dust away from the edge of the screw hole while cutting a perfectly clean hole without cracking the surface. The screw head closes the hole off with precision, leaving no damaged fibers around the head.

The R4 works well in wood, particle board, plastic, sheet metal, cement fiberboard, composite decking, wood decking, and melamine.


  • Star head-creates its own countersink hole
  • Use for any material without pre-countersinking
  • Use in all woodworking and plastic applications
  • Coated with Climatek corrosion protection
  • Transports dust from edge of screw hole
  • Screw head closes hole - leaving no damage
  • Use T25 bit
  • Quantity per Box: 675