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ASSY® 4 A2 CSMR hardwood universal screw A2 stainless steel plain full thread countersunk milling head
Full-thread screw made of high-quality austenitic A2 stainless steel with countersunk milling head for universal wood-wood fastening in outdoor areas exposed to the elements
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RW recess ensures optimal power transmission
- Larger contact surface at the bit offers increased power
- More stability, one-handed working and precise positioning due to the tight-fit recess and perfect fit of the bit
- Fewer bit changes, one bit for multiple screw diameters
- Compatibility with previous AW recess
Easy countersinking in hardwood/softwood with lots of knots as well as in hard manufactured boards
- Very high milling performance due to milling ribs located in the countersunk head
No over-tightening with high feed
- Higher power transmission in compact and hard woods due to coarse thread with reinforced, asymmetrical thread flank geometry
- Better anchorage due to higher thread flanks
Ideal for friction-free screwing in plastic, such as in anchors or in homogeneous highly compressed engineered wood
- Screw engages rapidly thanks to the continuous thread right up to the tip of the screw
- Non-spreading screwing in thanks to tip geometry without any component to reduce splitting
- Austenitic stainless steel is characterised by a high degree of corrosion resistance against aggressive industrial air, sea air, tap water, river water, mine water and salt water, as well as woods containing tannic acid. It has limited resistance to acid and is not suitable for atmospheres containing chlorine gas
- We recommend using the Würth software or corresponding design aids for planning and designing your installation. Dimensioning of ASSY screws can be carried out in the Würth timber construction software from a screw dia. of 5 mm
- ASSY 4, ASSYplus 4 and ASSYplus 4 VG chipboard screws are optimised for use in wood and engineered wood. For applications in plastic anchors where a reduction in the admissible load may occur, only use screws without an optimised thread tip (tip with milling ribs, drill tip, self-clearing groove etc.), such as the ASSY D screws with countersunk head or pan head
For steel-to-wood connections designed for withstanding large pull-out forces
The full thread starting immediately below the head enables a high load-bearing connection designed for withstanding large pull-out forces, e.g. fitting-to-wood or plywood-to-wood connection. The maximised thread length increases the force required to pull out the screw.
Can be used for outdoor applications and utilisation class 3
- ASSY screws are approved for quasi-static loads
- For optimal use of the screw, use the RW bit that fits exactly
- Full-thread screws are suitable for secure fastening of fittings or thin materials. Select a screw length that is less than the panel thickness of the base material
- If countersunk head screws are used for a metal-to-wood fastening, the metal to be connected must be provided with suitable countersunk holes
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