NEW SNK counter sink wood screws suitable for aggressive outdoor environments. Suitable for service class 1, 2 and 3 applications. Can be used for wooden panels <470 Kg/m3 without pre drilling. Part of the Rothoblass Holztechnic range.
Key Performance Characteristics
High torsional strength
Self perforating tip with set back notch
Ausentistic stainless steel A2
High Corrosion resistance
Counter sink head with under head ribs
Diameter 3.5mm - 8mm
Lengths 25mm to 320mm
Technical Properties
Nominal Diameter | d1 | mm | 3.5 | 4 | 4.5 | 5 | 6 | 8 |
Head Diameter | dk | mm | 7.00 | 8.00 | 9.00 | 10.00 | 12.00 | 14.50 |
Tip Diameter | d2 | mm | 2.25 | 2.55 | 2.80 | 3.40 | 3.95 | 5.40 |
Shank Diameter | ds | mm | 2.55 | 2.80 | 3.25 | 3.70 | 4.45 | 5.85 |
Head Thickness | t1 | mm | 3.5 | 3.8 | 4.25 | 4.65 | 5.3 | 6.0 |
Pre drilling hole diameter | dv | mm | 2.0 | 2.5 | 3.0 | 3.0 | 4.0 | 5.0 |
Characteristic Yield Moment | Myk | Nmm | 1260 | 1960 | 2770 | 4370 | 8220 | 17600 |
Characteristic withdrawal resistance parameter | Fax,k | N/mm2 | 19.1 | 17.1 | 17.2 | 17.9 | 11.6 | 14.8 |
Associated density | Pa | kg/m3 | 440 | 410 | 410 | 440 | 420 | 410 |
Characteristic head pull through parameter | Fhead,k | N/mm2 | 16.0 | 13.4 | 18.0 | 17.6 | 12.0 | 12.5 |
Associated density | Pa | kg/m3 | 380 | 390 | 440 | 440 | 440 | 440 |
Characteristic tensile strength | Ftens,k | kN | 2.21 | 3.23 | 4.40 | 5.01 | 6.81 | 14.1 |