ASSY 3.0 stnlss stl A2 full thread cntrsnk head AW
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Stainless steel A2, full thread, countersunk head, AW drive
Joins wood instead of splitting it
Asymmetrical thread – greater speed
AW drive — more power
Ring thread — less tendency of the wood to split, very few blow-outs
Corrosion-resistant, austenitic stainless steel (1.4301; 1.4567)
Pre-drilling to the core diameter in solid hard woods
ASSY 3.0 A2 are resistant to acid to a limited extent and are not suitable for use in atmospheres containing chlorine gas
To attach metals to wood, machine a precise cut-out in the metal tab.
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. Plug screws, DIN 571 hexagon wood screws or Wüpofast screws.
The range of applications of the various stainless steels is detailed in the following table issued by the ISER (German Information Office for Rustproof Stainless Steel, Non-Rusting Steels for Various Environmental Conditions, www.edelstahl-rostfrei.de, Information Sheet 828). Rustproof stainless steels (e.g. material no. 1.4016) are recommended in terms of atmospheric conditions only for use in a rural environment, and in this respect only subject to significant restrictions. We therefore recommend only using austenitic stainless steels for outdoor applications, taking the environmental conditions into account. Stainless steel A4 is especially suitable for use in an industrial atmosphere and for use near the sea.
Available work documents:
Timber dimensioning software, load tables and detailed processing instructions can be found on the service page www.wuerth.de/assy.
When using these screws, please follow ETA-11/0190 specifications.
Catalogue page as PDF 1
CAD Data (available after login)
The ASSY 3.0 A2 made from corrosion-resistant, austenitic stainless steel is designed especially for applications outdoors, in damp rooms and in salty atmospheres
For coniferous wood or wood-based materials made from softwood, make the fitting without a bradawl. To reduce the edge distances make a predrilled hole according to the core diameter. When screwing into hardwood, drill according to ETA-11/0190.
Nominal diameter (d)
Head diameter (dh)
Head height (k)
Wood screw thread
Thread length (lg)
Shape of tip
Tip with ring thread
Stainless steel A2
Min./max. screw-in angle
Product weight (per item)
Suitable for use in the following materials
Area of application
Screw requiring approval