ASSY® 4 FBS RCS RS roller-sorted window construction screw Steel zinc plated full thread raised countersunk head
ASSY 4 FBS RCS zp st, FT, c/s hd, roller-sorted RW
SCR-RCS-WO-RW20-(A3K)-4X25/19
ASSY 4 FBS RCS
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Ideal power transmission thanks to RW drive
- More power due to larger contact area at the bit
- More stability, one-handed working, precise positioning due to the tight-fit recess and perfect fit of the bit
- Fewer bit changes, 1 bit for many screw diameters
- Compatibility with previous AW drive
Visually appealing fasteners in window construction
- Lens-shaped, rounded head for a visually appealing window fitting connection
- The spring-loaded effect of the restraining ribs prevents the screw from overturning and destroying the head
Less tendency of the wood to split and very few blow-outs
- Blow-outs are avoided to a high degree thanks to the punching effect
- Minimal splitting forces, especially when screwing in at edges
- Reduction of the screw-in torque
- We recommend using the Würth software or the corresponding design aids for planning and dimensioning your assembly. Dimensions of the ASSY screws can be carried out in the Würth timber construction software from a ∅ of 5 mm
- Do not use the screw in applications with direct exposure to the elements or in humid rooms with atmospheres containing chlorine gas. If used outdoors and in rooms that are constantly exposed to high humidity, please use ASSY 4 A2 or A4 stainless steel screws and, if atmosphere is chlorine-containing, HCR stainless steel screws
- ASSY 4, ASSYplus 4 and ASSYplus 4 FT chipboard screws are optimised for use in wood and wood materials. For applications in plastic anchors where load capacity can also be reduced, use only 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
Datasheets(X)
Quick series screw connections
- For screwdriving machines
- Screw demagnetised after the manufacturing process
- Interference-free as foreign objects are sorted out of the screw packaging
For steel-wood connections designed for tensile forces
The full thread starting immediately below the head allows for e.g. fitting-wood or sheet material-wood connections designed for tensile forces with high load-bearing capacity. Greater screw pull-out force is achieved by the maximum thread length.
For applications in utilisation class 1 and utilisation class 2 (from ∅ > 4 mm)
- High-quality surface protection, zinc, blue-passivated chromium(VI)-free 8 µm layer thickness
- Suitable for use in utilisation class 1 (interior) and from ∅ > 4 mm in utilisation class 2 (covered outdoor area) according to EN 1995-1-1:2010-12 + DIN SPEC 1052-100:2013-08
- The requirement of classification T2/C2 is fulfilled in accordance with prEN 14592:2017 (D)
- ASSY screws are approved for quasi-static loads
- For optimum use of the screw, the right-size RW bit must be used
- Full-thread screws are suitable for secure mounting of fittings or thin materials. The screw length to be selected should be less than the plate thickness of substrate the screw is to be driven in
Material | Hardened steel |
Surface | Zinc plated |
RoHS-compliant | Yes |
Nominal diameter (d) | 4 mm |
Length (l) | 25 mm |
Head diameter (dh) | 7.2 mm |
Head height (k) | 2.5 mm |
Internal drive | RW20 |
Thread length (lg) | 19 mm |
Head type | Raised countersunk head |
Head details | Restraining ribs |
Thread type | Wood screw thread |
Thread design | Full thread |
Thread form | Single start thread |
Core diameter | 2.5 mm |
Shape of tip | Tip with ring thread |
Angle of the tip | 20 Degree |
Colour | Silver |
Product weight (per item) | 1.410 g |
Min. screw-in angle | 0 Degree |
Max. screw-in angle | 90 Degree |
Suitable for use in the following materials | Wood |
Area of application | Windows |
Suitable machines | Würth BS 12-A Power |
Approval | ETA-11/0190 |
Declaration of performance (EU-CPR) | Yes |
Select RAL-colour code
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