For detailed information, other images and documents, please select individual articles from the following table.
ASSY® 3.0 HB Wood screw
Especially suitable for timber construction/carpentry and for concrete and formwork construction and for all other wood-to-wood screw connections where poorer-grade wood qualities are used.
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Variants
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Tip
The 25° tip enables precise positioning. Screw with counter thread in tip area, which greatly reduces the splitting forces of the wood, especially in the edge area. The screw-in torque is considerably lower than with conventional chipboard screws and extends the service life of the application machine and the bit insert.
Thread
The plastic glide-coated asymmetrical coarse thread means a 30 % reduction in working time.
End mill
The milling section after the thread reduces the screw-in torque by 20 %.
Thin shaft
The thin shaft enables a tension-free connection without gaps.
Countersunk milling head
60° countersunk milling head for easy, clean countersinking in solid construction wood and coated wood panel materials.
AW® drive
- Better power transmission
- Optimal centring
- Long service life
- Even distribution of force prevents the surface coat from being damaged
Do not use the screw in applications with direct exposure to weathering, in humid rooms and in atmospheres containing chlorine gas.
The screws are not suitable for outdoor use or for rooms subject to short-term or continuously high humidity levels! Please use ASSY® 3.0 A2 stainless steel screws in these cases. The nickel/brass plated surface coats are only suitable for decorative purposes = no corrosion protection!
ASSY 3.0 chipboard screws are optimised for use in engineered wood. Use in plastic anchors may cause a reduction in the admissible load. Therefore, we recommend only using screws without optimised thread tips (drill tip, counter 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).
When using these screws, the ETA-11/0190 specifications must be observed.
Available work documents:
Timber dimensioning software, load tables and detailed processing instructions can be found on the service page www.wuerth.de/assy.
For wood-to-wood screw connections where poorer-grade wood qualities are used.
Screw-in angle 0° to 90°. For softwood or engineered wood made from softwood, the screw connection is made without pre-drilling. To reduce the edge distances, a pre-drilled hole can be made according to the core diameter. When screwing into hardwood, pre-drill according to ETA-11/0190.
Select RAL-colour code
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