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A2 stainless steel, partial thread, countersunk head, AW drive

Joins wood instead of splitting it

Asymmetrical single-start thread — greater speed, greater traction

Low screw-in torque
High over-turning force
Faster screwing than conventional particle board screws
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
 

Material:

Corrosion-resistant, austenitic stainless steel (1.4301; 1.4567)

Notice
Pre-drilling to core diameter on solid hard woods

ASSY® 3.0 A2 have limited resistance to acid and are unsuitable for chloride gas-containing atmospheres.

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. If used in plastic anchors, this 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. ASSY D, prefix number 0151 (countersunk head) and prefix 0153 (pan head).

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 using only 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.

ETA-11/0190

When using these screws, please follow ETA-11/0190 specifications.