ASSY®plus 4 A2 CSMR universal screw A2 stainless steel plain, partial thread, countersunk milling head
ASSYplus 4 A2 CSMR sst A2 PT cs mill. head RW
SCR-CSMR-DBIT-A2-RW20-4X40/21
ASSYPLUS 4 A2 CSMR
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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, one bit for many screw diameters
- Compatibility with previous AW drive
Precise positioning and very clean drilling due to advanced centring drill tip
- Positioning and drilling without chipping
- Maximum drilling performance and precise drilling process through drilling cutting edges (similar to Forstner bits)
- Precise positioning on hard surfaces without slipping thanks to centring pin
- Quick screwing due to gentle start of thread
Easy countersinking in hardwood/softwood with high knot content as well as hard wood fibreboards
- Very high milling performance due to milling ribs located at the countersunk head
Maximum reliability of the screw connection due to asymmetrical single thread
- Optimal matching of drill tip and thread geometry
- Excellent anchoring in wood due to asymmetrical arrangement of thread flanks
Stainless mounting for accessible wood connections in outdoor areas exposed to weathering
- Made of austenitic, non-magnetic and non-rusting A2 stainless steel
- Can be used in rural or urban environments or industrial atmospheres without significant exposure to chlorides or SO2
- With friction-reducing slide coating for easy screwing
- We recommend using the Würth software or the corresponding design aids for planning and dimensioning your assembly. Use the Würth timber construction software for dimensioning of ASSY screws from a diameter 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 (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.
For wood-wood connections designed to pull together
The partial thread starting immediately below the shank allows for wood-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
- For optimum use of the screw, the right-size RW bit must be used
- ASSY screws are approved for quasi-static loads
- 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
- For metal-wood connections, ASSY screws with a countersunk head or countersunk head with milling pockets are preferable to countersunk head screws with milling ribs
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Nominal diameter (d) | 4 mm |
Length (l) | 40 mm |
Thread length (lg) (lg) | 21 mm |
Screw-thread length with drill tip (b) (b) | 24.5 mm |
Head type | Countersunk head |
Head details | Milling ribs |
Head diameter (dh) | 8 mm |
Head height (k) | 3.6 mm |
Internal drive | RW20 |
Thread type | Wood screw thread |
Thread design | Partial thread |
Design | With shaft |
Thread form | Single start thread |
Core diameter | 2.7 mm |
Shape of tip | Drilling tip |
Material | Stainless steel A2 |
Surface | Plain |
Max. screw-in angle | 90 Degree |
Min. screw-in angle | 0 Degree |
Suitable for use in the following materials | Board ply wood (BSP), Wood, Derived timber product, Hardwood, LVL, Softwood, Construction timber (KVH), OSB, Chipboard, Solid wood panel (SWP) |
Area of application | Outdoors, Balcony, Element construction, Façades, Wet areas, Timber construction, Timber panel construction, Structural woodwork, Play equipment, Board walk, Terrace, Fence |
Approval | ETA-11/0190 |
Product weight (per item) | 2.542 g |
RoHS-compliant | Yes |
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