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ASSY® 3.0 SK Timber screw
ASSY<SUP>®</SUP> 3.0 SK Timber screw - 1
ASSY<SUP>®</SUP> 3.0 SK Timber screw - 2
ASSY<SUP>®</SUP> 3.0 SK Timber screw - 3

For detailed information, other images and documents, please select individual articles from the following table.

ASSY® 3.0 SK Timber screw

The ASSY 3.0 SK with a large washer head is especially suitable for staircase construction/woodworking and carpentry. For screw connections in staircase construction, modular construction, timber and passive house construction.

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Hardened steel, zinc-plated, blue passivated, partial thread, large washer head, AW drive, mating thread



Connects the wood instead of splitting it


Substrates:


Solid wood (coniferous wood, ash, beech, oak), laminated beams, cross laminated timber (CLT), timber veneer (coniferous wood or BauBuche), OSB and chipboard.



Large washer head


  • Very high penetration resistance or consolidation

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 3 bit sizes for the diameters 5.0 to 12.0 mm

End mill – the "auxiliary motor" for lower force


  • Reduction of the screw-in and head countersinking torque by around 20%, especially with long screws

  • Protection of screw-in tools

  • From diameter = 5 mm, L = 70 mm

Asymmetric coarse thread – faster speed


  • Low screw-in torque

  • High over-turning force

  • Faster screwing than conventional chipboard screws – reduces processing time by 30%

Tip


  • Very precise positioning thanks to the 34° tip

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
Notice

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, please follow ETA-11/0190 specifications.