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ASSY®plus VG 4 CH construction screw Zinc-plated steel full thread cylinder head shank painted white
Special full-thread screw with small cylinder head for high-load-bearing wood-wood connections or reinforcements in structural wood construction, which also require small edge and screw clearances, in dry indoor or humid areas
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Ideal power transmission thanks to RW recess
- 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
Unobtrusive mounting of wooden components
- Small head diameter for unobtrusive mounting
- Low splitting effect when countersinking the screw head
Highest power transmission in the tensile and compressive direction
- Symmetrical high-performance thread matched to the pre-drilling performance of the drill tip
- For high-load wood-wood connections regardless of the load direction
Compact screw connections and small material cross-sections due to effective drill tip
- Very small permissible edge distances, e.g. 3xd, making ASSY screws ∅ 8 mm usable for beam widths of 60 mm
- No pre-drilling required
- The wood does not split and rupture
- Little run-off of long screws
High strength values and ductility
- A coordinated heat treatment guarantees high strength values and at the same time ensures high ductility
- We recommend using the Würth software or the corresponding design aids for planning and designing your installation. Dimensioning the ASSY screws can be carried out in the Würth timber construction software from a diameter 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
- ASSY 4, ASSYplus 4 and ASSYplus 4 VG chipboard screws are optimised for use in wood and engineered woods. For applications in plastic anchors where the load 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
Approved according to ETA-11/0190, for wood-concrete composite ceilings ETA-13/0029
The requirements of the European Technical Approval (ETA) must be observed
For connections with high tensile or compressive pull-out loads and exposed wood-wood connections in structural timber construction
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For applications in utilisation class 1 and 2 (from diameter > 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 diameter > 4 mm in utilisation class 2 (wet area or 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, use the RW bit that fits exactly
- In the case of transverse compression reinforcements, a pressure distribution plate must be inserted between the support bearing and the screw heads for even force transfer. The screw head must be flush with the pressure distribution plate. Use full-thread screws with a countersunk head if suitable. The steel plate thickness must be dimensioned in such a way that a uniform load distribution on the screws is guaranteed
- For the reinforcement of wooden components at a right angle to the fibre under tension load, at least 2 screws must be used. If the length of thread engagement is least 20 x d above or below the crack-prone area, with d being the outer thread diameter of the screw, only one screw may be used
- Full-thread screws are suitable for reinforcing and creating high load-bearing connections of two components. When connecting two components, these should be connected without any mounting gap
- For long screws arranged in a cross shape or in a screw block with narrow margins, it is advisable to drill pilot holes or use a screw-in aid to avoid contact with screws
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