The Cobra self-drilling stainless steel screw has been developed to facilitate the fixing of your deck boards on wooden joists.
Made of A2 stainless steel, this resistant screw fixes and stabilises your decking effectively. Stainless steel 304 (A2) is frequently used for outdoors because of its durability and stability over time.
The quality of these screws allows them to perforate and fix all types of wooden deck boards with varying densities: exotic wood, softwood, pine, composite...
The length of the screw should be 2.5 times the thickness of the decking. 3 screw sizes are available, with one size adapted to each decking thickness, to comply with DTU 51-4:
5x50 mm |
Decking up to 21 mm |
5x60 mm |
Maximum 27 mm softwood decking |
6x70 mm |
Hardwood decking up to 28 mm in thickness |
Two stainless steel screws are required per fixing point. The board must be pre-drilled with the same drill bit diameter, or even slightly larger than the screw diameter + countersink. The upper bare side of the countersunk screw must be slightly smaller than the upper side of the board (2mm).
The distance between the edges of the board is 1.5 to 2 cm. Always fix the ends of the boards less than 5 cm from the edge.
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