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ASSY® 4 Isotop roofing screw Steel zinc plated double thread cylinder head
ASSY<SUP>®</SUP> 4 Isotop roofing screw Steel zinc plated double thread cylinder head - 1
ASSY<SUP>®</SUP> 4 Isotop roofing screw Steel zinc plated double thread cylinder head - 2
ASSY<SUP>®</SUP> 4 Isotop roofing screw Steel zinc plated double thread cylinder head - 3
ASSY<SUP>®</SUP> 4 Isotop roofing screw Steel zinc plated double thread cylinder head - 4
ASSY<SUP>®</SUP> 4 Isotop roofing screw Steel zinc plated double thread cylinder head - 5
ASSY<SUP>®</SUP> 4 Isotop roofing screw Steel zinc plated double thread cylinder head - 6
ASSY<SUP>®</SUP> 4 Isotop roofing screw Steel zinc plated double thread cylinder head - 7
ASSY<SUP>®</SUP> 4 Isotop roofing screw Steel zinc plated double thread cylinder head - 8
ASSY<SUP>®</SUP> 4 Isotop roofing screw Steel zinc plated double thread cylinder head - 9
ASSY<SUP>®</SUP> 4 Isotop roofing screw Steel zinc plated double thread cylinder head - 10

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ASSY® 4 Isotop roofing screw Steel zinc plated double thread cylinder head

Special double threaded screw ideal for fixing roof insulation and façade mountings with soft or pressure-resistant insulation materials in indoor dry or sheltered areas

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Available in 10 versions

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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, one bit for many screw diameters

  • Compatibility with previous AW drive


Unobtrusive mounting of wooden components


  • Small head diameter for unobtrusive mounting

  • Low splitting effect when countersinking the screw head


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 anchoring thanks to higher thread flanks


Smooth thread start ensures optimised recessing and biting of the screw


  • Reduced splitting effect due 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


Ideal for flexible loads such as insulation on rafters


  • Bridging non-load-bearing spaces
Notice
  • We recommend using the Würth software or the corresponding design aids for planning and dimensioning your assembly. Use the Würth timber construction software for dimensioning of ASSY screws from a diameter of 5 mm

  • Do not use for screw applications with direct exposure to the elements or in humid rooms with atmospheres containing chlorine gas

  • ASSY 4, ASSYplus 4 and ASSYplus 4 FT chipboard screws are optimised for use in wood and wood materials. 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 tip, self-clearing groove etc.), such as the ASSY D screws with countersunk head or pan head

ETA-11/0190 approved