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ASSY® 4 CSMR double-start thread Steel zinc-plated partial thread countersunk milling head
Special partial thread screw with ribbed countersunk head with milling pockets for fastening of particleboard flooring in indoor dry or wet areas
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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 double-start 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
- 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
- Do not use the screw in applications with direct exposure to weathering or in humid rooms with atmospheres containing chlorine gas. If used outdoors or in rooms that are constantly exposed to high humidity, please use ASSY 4 A2 or A4 stainless steel screws and, if the atmosphere contains chlorine, use HCR stainless steel screws
- 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
ETA-11/0190 approved
The requirements of the European Technical Approval (ETA) must be observed
For wood-to-wood connections designed to be joined tightly
The partial thread starting immediately below the shank allows for wood-to-wood connections designed to be joined tightly. In this case, the thread is positioned entirely in the lower component.
For applications in utilisation class 1 and utilisation class 2 (from dia. > 4 mm)
- High-quality, chromium(VI)-free, blue passivated, zinc surface protection, up to dia. 4 mm A2K 5 µm, from dia. 4.5 mm A3K 8 µm layer thickness
- Suitable for use in utilisation class 1 (indoor areas) and from dia. > 4 mm in utilisation class 2 (wet areas or covered outdoor areas) in accordance with EN 1995-1-1:2010-12 + DIN SPEC 1052-100:2013-08
- For screws from dia. 4.5 mm with zinc layer thickness 8 µm with Cr(III) passivation, the requirement of classification T2/C2 is fulfilled in accordance with prEN 14592:2017 (D)
- 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 reinforcing and creating high load-bearing connections between two components. When connecting two components, these should be connected without leaving a gap
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