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Window frame screws FFSZ

The economical special screw for window installation

The fischer window frame screw FFSZ (with a length of up to 302 mm) with a cylinder head is a special screw for the cost-effective installation of wooden window frames without plugs. The ift Rosenheim Testing Institute confirms their special suitability for the fixing of plastic widows into brick masonry. The small drill hole diameter of 6 mm and the screwing-in of the screw without cleaning the drill hole enable efficient series fixings. The high-deep thread on the screw tip and the milled ribbing reduce the screw-in torque and enable an energy-saving installation. The continuous special thread prevents the window frame from being pulled against the substrate. This means that the frame is secured to the building material without tensile force or stress.

Product Description

  • Screw installation without plug for economical processing.
  • The small drill bit diameter of 6 mm allows for efficient series installation.
  • The continuous thread ensures a stress-free fixing of the frame in the substrate.
  • The high-low-thread at the screw tip as well as several cutting notches reduce the amount of force required for screwing in the screws. The installation process can be completed without excessive effort.
  • With two head types applicable for all common frame materials.
  • According to the ift Rosenheim suitable for the fixation of a plastic window in brick masonry.

Available Product Variants


Application and Permission

  • Window frames made of wood, plastic and aluminium
  • Door frames
  • Squared timbers
Building materials
  • Concrete
  • Vertically perforated brick
  • Hollow blocks made from lightweight concrete
  • Perforated sand-lime brick
  • Solid sand-lime brick
  • Solid brick made from lightweight concrete
  • Solid brick
  • Aerated concrete
* You can find detailed information on building materials in the registration document.
For Details see corresponding Documents

Assembly Instruction

  • Note the drill hole and screw-in depths for the different building materials listed in the table.
  • Cylinder head screws are recommended for recessed installation in wooden profiles.
  • Flat head screws are recommended for installation in plastic and aluminium profiles.
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Documents for Downloading

Additional Documents

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