The COBRA® self-drilling stainless steel screw has been developed to make it easier to attach deck boards to wooden joists. The screw head has a deep Torx recess to prevent losing the screw head and slippage.
Made of AISI304 stainless steel (A2), Cobra screws fix and holds your decking efficiently and durably.
Cobra screws could be used to fix all types of wooden deck boards. For very high density wood species, predrilling is recommended.
The length of the screw should be 2.5 times the thickness of the decking. 3 screw sizes are available, to match with the majority of decking boards available in the market
5x50mm |
Decking between 21 and 23 mm thickness |
5x60mm |
Decking between 24 and 27 mm thickness |
6x70mm |
Decking up to 28 mm thickness |
We strongly recommend pre-drilling very dense hardwoods (over 900 kg/m3)
Structure |
Hradwood wood |
Softwood |
Aluminium |
Steel |
Use |
✔ |
✔ |
- |
- |
Two screws are required on each joist.
When using our Cobra Smart Bit drill and countersink tool, make sure to choose the right drill diameter. The top of the countersink head screw must be slightly lower than the upper face of the board (2mm)
The fixing distance should be located at 1.5 to 2 cm from the board side edge, and less than 5 cm from the end edge to avoid splitting the wood.
Name |
Size |
A (mm) |
L (mm) |
U (mm) |
D (mm) |
dr (mm) |
Torx |
0601 - 0799 |
M5x50 |
8 |
50 |
4 |
5 |
4 |
T25 |
0602 - 0966 |
M5x60 |
8 |
60 |
8 |
5 |
4 |
T25 |
0613 |
M6x70 |
10 |
70 |
10 |
6 |
5 |
T30 |
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