ASSY® 3.0 zinc-plated blue chipboard screw
ASSY 3.0 steel zinc plated FT countersunk head AW
SCR-CS-WO-AW20-(A2K)-3,5X25/21
ASSY 3.0
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Galvanised steel, blue coated, full thread, countersunk head, AW drive
Joins wood instead of splitting it
Asymmetrical thread – greater speed
- Low screw-in torque
- High over-turning force
- Faster screwing than conventional particle board screws
- Double thread: 3.0–4.5 mm
AW drive — more power
- Optimal force transmission
- Excellent fit
- Rapid finding
- Screw settles securely
- Virtually no unscrewing of bit
- No wobbling
- No damage to surface coating of screw
- Only 5 bit sizes for diameters 3.0 to 12.0 mm
Ring thread — less tendency of the wood to split, very few blow-outs
- Low splitting forces, in particular when screwing close to edges
- Reduction of screw-in torque
- Punch effect of ring thread largely prevents blow-outs
The screws are not suitable for outdoor use and for rooms subject to short-term or continuous high moisture levels! Please use ASSY® 3.0 A2 stainless steel screws in these cases.
To attach metals to wood, machine a precise cutout in the metal tab.
ASSY 3.0 chipboard screws are optimised for use in wooden materials. When used in plastic anchors, a reduction of the load-bearing capacity is possible. Therefore, we recommend only using screws without optimised thread tips (drill bit, mating thread, ring thread, serrated edge, self-clearing groove, etc.) in plastic dowels, e.g. Würth ASSY D, prefix 0151 (countersunk head) and prefix 0153 (pan head).
Available work documents:
Timber dimensioning software, load tables and detailed processing instructions can be found on the service page: www.wuerth.de/assy.
Datasheets(X)
CAD data (available after login)
When screwing into hardwood, drill according to ETA-11/0190.
 | |
Nominal diameter (d) | 3.5 mm |
Length (l) | 25 mm |
Head type | Countersunk head |
Head diameter (dh) | 6.9 mm |
Head height (k) | 3.3 mm |
Internal drive | AW20 |
Thread type | Wood screw thread |
Thread design | Full thread |
Thread form | Single start thread |
Thread length (lg) | 21 mm |
Core diameter | 2.1 mm |
Shape of tip | Tip with ring thread |
Angle of the tip | 34 Degree |
Material | Hardened steel |
Surface | Zinc plated |
Colour | Silver |
Min./max. screw-in angle | 0-90 Degree |
Product weight (per item) | 1.149 g |
Suitable for use in the following materials | Wood |
Area of application | Universal |
Approval | ETA-11/0190 |
Screw requiring approval | Yes |
RoHS-compliant | Yes |
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