ASSY® 4 CSMP universal screw Steel zinc flake full thread countersunk head with milling pockets
ASSY 4 CSMP FLZN stl zinc flake FT c/s mill pkt RW
SCR-CSMP-WO-RW20-(FLZ)-5X25/20
ASSY 4 CSMP FLZN
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Ideal power transmission thanks to RW drive
- More power due to larger contact area at the bit
- More stability and precise positioning due to perfect fit of the bit in the screw drive
- One-handed work and excellent support when positioning due to tight-fit recess
- Fewer bit changes thanks to wide coverage of applications by just one bit
- Compatibility with previous AW drive
Significant reduction in the amount of force required when screwing in the screw
- Less splitting when immersing the shank due to the displacement milling effect of the milling shank
- Minimised risk of screw breakage due to high breaking torque
- Reduced risk of injury from protruding metal chips due to the integration of the milling shank into the thread
- High protection of the application tools
Maximum overtightening safety with high feed performance
- Higher power transmission in hardwoods due to reinforced, asymmetrical thread flank geometry of the coarse thread
- Better anchoring depth due to increased thread flank
Smooth thread start ensures optimised recessing and biting of the screw
- Low gap effect due to the displacement effect of the dome-shaped milling elements, which are in the opposite direction to the tip with milling ribs
- Friction-reduced thread rotation allows reduction of the screw-in force to be applied
High strength values and ductility
- Adjusted heat treatment guarantees high strength values and high ductility
- We recommend using the Würth software or the corresponding design aids for planning and dimensioning your assembly. ASSY screws can be dimensioned in the Würth timber construction software from a ∅ of 5 mm
- 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 (coupling cutter tip, 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)
For wood to wood connections designed to pull together
The partial thread starting immediately below the shank allows for wood to wood connections designed to pull together. The screw thread is positioned entirely in the lower component once screwed in.
Can be used for outdoor applications and utilisation class 3 according to EN 1995-1-1
- Five times higher corrosion protection of the zinc-flake surface, chromium(VI)-free, 20 µm layer thickness, 1000 h in salt spray testing according to DIN EN ISO 9227
- Utilisation class C4 according to EN ISO 12944-2
- To increase the joining effect or head pull-through resistance, combining with perfectly fitting washers for ASSY 4 is recommended
- ASSY screws are approved for quasi-static loads
- For optimum use of the screw, the exact RW bit must be used
- Partial-thread screws are ideal for connecting wooden components. To achieve optimum assembly of the components, the components to be fixed must not be thicker than the length of the shank
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Nominal diameter (d) | 5 mm |
Length (l) | 25 mm |
Thread length (lg) | 20 mm |
Head type | Countersunk milling pocket head |
Head details | Milling pockets |
Head diameter (dh) | 9.6 mm |
Head height (k) | 3.2 mm |
Internal drive | RW20 |
Thread type | Wood screw thread |
Thread design | Full thread |
Thread form | Coarse thread |
Core diameter | 3.2 mm |
Shape of tip | Tip with hilltop milling cutter |
Angle of the tip | 34 Degree |
Material | Hardened steel |
Surface | Flake zinc |
Colour | Aluminium grey |
Min./max. screw-in angle | 0-90 Degree |
Suitable for use in the following materials | Wood, Derived timber product |
Area of application | Universal, Element construction, Roof |
Suitable machines | Würth BS 14-A Combi |
Screw requiring approval | Yes |
Approval | ETA-11/0190 |
RoHS-compliant | Yes |
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