ASSY® 3.0 chipboard screw with head recess
ASSY 3.0 steel zinc plated AW with head recess
SCR-CS-MPK-WO-HDH-AW20-(A3K)-4,5X50/28
ASSY 3.0
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Connects the wood instead of splitting it!
Milling pockets — countersink anywhere
- Suitable for wood and fittings
- Minimum damage to coated wood materials
- Less chips on the surface
Asymmetric thread — faster speed
- Low screw-in torque
- High over-turning force
- Faster screwing in than conventional chipboard screws
AW drive — more power
- Optimum transmission of forces
- Very good snug fit
- Fast location
- Screw locates securely
- Almost no unscrewing of the bit
- No wobbling
- No damage to surface coating of screw
- Only 5 bit sizes for the diameters 3.0 to 12.0 mm
Ring/mating thread — less tendency of the wood to split, very few blow-outs
- Minimal splitting forces, especially when screwing in at edges
- Reduction of the screw-in torque
- Blow-outs are avoided to a high degree thanks to the punching effect of the ring thread
- 3.0–4.5 mm diameter = ring thread
- 5.0–12.0 mm diameter = mating thread
Head access hole
Suitable for cover caps with 2.5 mm stud diameter
The screws are not suitable for outdoor use and for rooms subject to short-term or continuously high moisture levels! Please use ASSY 3.0 A2 stainless steel screws in these cases. The surface coatings of nickel and brass are suitable for decorative purposes only = no corrosion protection!
ASSY 3.0 chipboard screws are optimised for use in wooden materials. Use in plastic anchors may cause a reduction in the load-bearing capacity. Therefore, we recommend only using screws without optimised thread tips (drill tip, mating thread, ring thread, serrated edge, self-clearing groove, etc.) in plastic anchors, e.g. Würth ASSY D, prefix number 0151 (countersunk head) and prefix number 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.
ETA-11/0190
When using these screws, the ETA-11/0190 specifications must be observed.
Datasheets(X)
CAD data (available after login)
For screwing elements made of wood and wooden materials in shop construction, furniture construction and interior finishing applications
 | |
Nominal diameter (d) | 4.5 mm |
Length (l) | 50 mm |
Thread length (lg) | 28 mm |
Head type | Countersunk head |
Head details | Milling pockets |
Head access hole | Yes |
Head access hole diameter | 2.5 mm |
Head diameter (dh) | 8.65 mm |
Head height (k) | 2.45 mm |
Internal drive | AW20 |
Thread type | Wood screw thread |
Thread design | Partial thread |
Thread form | Double start thread |
Core diameter | 2.7 mm |
Shape of tip | Tip with ring thread |
Angle of the tip | 20 Degree |
Material | Hardened steel |
Surface | Zinc plated |
Colour | Silver |
Min./max. screw-in angle | 0-90 Degree |
Suitable for use in the following materials | Board ply wood (BSP) |
Area of application | Furniture |
Additional accessory | Cover cap |
Screw requiring approval | Yes |
Approval | ETA-11/0190 |
RoHS-compliant | Yes |
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