Machine wood screw 55x4,2 coarse

Ruspert-coated and painted green
Countersunk coarse-threaded machine wood screw with cross recess
Used specifically for fastening wooden building panels (particle boards, plywood, OSB).
The head features "countersinking threads," making it easy to drive the screw flush with the panel surface without damaging the surface.
Recommended screw length is generally approximately 3 times the thickness of the panel.