For detailed information, other images and documents, please select individual articles from the following table.
ASSY® 4 P CSMP universal screw Zinc plated steel, painted head, partial thread with underhead thread, milling pocket head
Universal partial-thread screw with underhead thread with high tightening effect for fast, gap-free fastening of wood-wood connections in furniture construction, interior finishing or timber construction in indoor dry or humid areas
Register now and access more than 150,000 products
Variants
Register now and access more than 150,000 products
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
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
Smooth thread start ensures optimised piercing and engaging of the screw
- Minimal splitting due to material displacement by the dome-shaped milling elements in the tip
- Minimal friction when screwing in the thread reduces the amount of force required
- 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
For connecting two wooden elements without leaving a gap
The underhead thread has a reduced thread pitch and enlarged external diameter, allowing two wooden elements to be connected without leaving a gap. The screw head can be made flush with the material surface.
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
- Body partial thread screws are ideal for joining light engineered wood such as chipboard. To ensure the components are optimally joined, the components must be thicker than the length of the screw shank
Select RAL-colour code
!! NOTE: On-screen visualisation of the colour differs from real colour shade!!