Machine wood screw 45x4,2 coarse

Stainless Steel (A2)
Countersunk coarse thread wood screw with cross slot
Specifically used for fastening wooden construction panels outdoors (particle board, plywood, OSB).
The head features "countersinking threads," making it easy to drive the screw flush with the surface without damaging the panel surface.
The recommended screw length is generally about 3 times the panel thickness.