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ASSY® 4 WH washer head screw Steel zinc flake partial thread washer head
ASSY<SUP>®</SUP> 4 WH washer head screw Steel zinc flake partial thread washer head - 1
ASSY<SUP>®</SUP> 4 WH washer head screw Steel zinc flake partial thread washer head - 2
ASSY<SUP>®</SUP> 4 WH washer head screw Steel zinc flake partial thread washer head - 3
ASSY<SUP>®</SUP> 4 WH washer head screw Steel zinc flake partial thread washer head - 4
ASSY<SUP>®</SUP> 4 WH washer head screw Steel zinc flake partial thread washer head - 5
ASSY<SUP>®</SUP> 4 WH washer head screw Steel zinc flake partial thread washer head - 6
ASSY<SUP>®</SUP> 4 WH washer head screw Steel zinc flake partial thread washer head - 7
ASSY<SUP>®</SUP> 4 WH washer head screw Steel zinc flake partial thread washer head - 8
ASSY<SUP>®</SUP> 4 WH washer head screw Steel zinc flake partial thread washer head - 9
ASSY<SUP>®</SUP> 4 WH washer head screw Steel zinc flake partial thread washer head - 10

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ASSY® 4 WH washer head screw Steel zinc flake partial thread washer head

Partial-thread screw with large washer head for wood-wood fixing in C4 atmospheres outdoors

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Ideal power transmission thanks to RW drive


  • More power due to larger contact area at the bit

  • More stability, one-handed working, precise positioning due to the tight-fit recess and perfect fit of the bit

  • Fewer bit changes, 1 bit for many screw diameters

  • Compatibility with previous AW drive


Flat fastening of sheet metal onto substrate for secondary purposes


  • Flat, cylindrical pan head rounded with a lens

  • Large surface contact area


No over-tightening or stripping and high feed


  • Higher power transmission in hardwoods due to reinforced, asymmetrical thread flank geometry of the coarse thread

  • Better anchorage thanks to higher thread flanks


Smooth thread start ensures optimised recessing and biting of the screw


  • Minimum splitting thanks to displacement effect of the dome-shaped milling elements in the tip

  • Friction-reduced thread rotation allows reduction of the screw-in force to be applied
Notice
  • Austenitic stainless steel is characterised by a high degree of corrosion resistance against aggressive industrial air, sea air, tap water, river water, mine water, and salt water, as well as woods containing tannic acid. It is resistant to acid to a certain extent and not suitable for atmospheres containing chlorine gas

  • We recommend using the Würth software or the corresponding design aids for planning and designing your assembly. ASSY screws can be designed from a ∅ 5 mm in the Würth timber construction software

  • ASSY 4, ASSYplus 4, and ASSYplus 4 FT chipboard screws are optimised for use in wood and engineered wood. For applications in plastic anchors where load capacity can also be reduced, use only screws without an optimised thread tip (tip with milling ribs, drill bit tip, self-clearing groove, etc.), such as the ASSY D screws with countersunk head or pan head

ETA-11/0190 approved

The requirements of the European Technical Approval (ETA) must be observed