For detailed information, other images and documents, please select individual articles from the following table.
ASSY® 4 VGN CSMP construction screw Steel zinc plated full thread countersunk milling pocket head
Special full-thread screw with countersunk milling pocket head for universal use for high-load-bearing wood-wood, wood-metal connections or reinforcements in structural timber construction in indoor dry areas or wet areas.
Register now and access more than 125,000 products
Variants
- 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
- Clean countersinking in softwood or engineered wood
- Easy countersinking of screw head in wood due to optimised milling pockets
- No chipping in coated chipboards due to improved milling effect and increased number of milling pockets up to dia. 4.5 mm
- Perfect fit of 90° head in fittings with metal countersinks
- Visually appealing countersunk finish in wood-wood applications and precise countersunk finish in metal-wood applications due to innovative milling pockets
- Optimum balance between joining and countersinking
- Perfect countersinking in coated chipboard
- Clean finish of the countersunk head in solid wood
- Braking effect on metal and milling effect on wood
- Optimised number of milling pockets depending on the application
- Highest power transmission in the tensile and compressive direction
- For high load-bearing wood-to-wood connections regardless of the load direction
- No pre-drilling required
- No splitting or cracking of the wood
- Little run-off of long screws
- High strength values and ductility
- Precise heat treatment guarantees high strength values and high ductility
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 diameter of 5 mm.
Do not use the screw in applications with direct exposure to the weather or in wet 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.
The requirements of the European Technical Approval (ETA) must be observed.
The full thread starting immediately below the head enables a high-load-bearing connection designed for withstanding large pull-out forces, e.g. fitting-metal-wood or panel material-wood connections. The maximised thread length increases the force required to pull out the screw.
For applications in utilisation class 1 and 2 (from dia. > 4 mm)
High-quality chromium(VI)-free blue passivated zinc surface protection, layer thickness 8 µm
Suitable for use in utilisation class 1 (indoor areas) and from dia. > 4 mm in utilisation class 2 (wet area or covered outdoor area) in accordance with 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)
For optimal use of the screw, use the custom-fit RW bit
In the case of transverse compressive reinforcement, 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. Full-thread screws with countersunk head are preferable. When dimensioning the steel plate thickness, an even load distribution on the screws must be ensured
At least two screws must be used for the reinforcement of wooden components at a right angle to the fibre under effect of tensile action. If the length of thread engagement is at least 20 x d above and below the crack-prone area, with d being the outer thread diameter of the screw, only one screw may be used
If countersunk head screws are used for a metal-wood fastening, the metal to be connected must be provided with suitable countersunk holes
For a load-bearing wood-metal connection, ASSY screws must be tightened to a torque value. Tightening torque = required prevailing torque x 1.2 < 90 % of the breaking torque
For long screws arranged in a cross shape or in a screw block with narrow edge distances, it is advisable to drill pilot holes or use a screw-in aid to avoid contact with screws
Select RAL-colour code
!! NOTE: On-screen visualisation of the colour differs from real colour shade!!