Concrete screw ULTRACUT FBS II US

The high-performance concrete screw for absolute installation ease

The fischer concrete screw ULTRACUT FBS II US is a powerful anchoring solution with top installation comfort. The concrete screw with its pressed-on washer is ideal for slot fixations and the anchoring of wooden constructions as well as beams and sills. The European Technical Approval for cracked concrete and non-cracked concrete as well as for seismic loads and classification into fire resistance class R 120 guarantee even more safety. The saw tooth geometry enables a quick and easy installation. No drill hole cleaning is required for installation in ceilings and floors. The expansion-free anchorage system enables low edge and axial spacings.

Product Description

  • With up to 3 embedment depths, the ULTRACUT FBS II US allows for the same screw to be used for different component thicknesses.
  • The special saw tooth geometry enables fast cutting into the concrete.
  • Drill holes do not need to be cleaned during vertical installation (ceiling and floor). For floor fixings the hole must be drilled 3x drill hole diameter deeper.
  • Expansion-free anchoring (undercut) allows for lowest edge- and axial spacings.
  • The ETA approval covers applications in cracked concrete and seismic power categories C1 and C2.
  • The approved adjustment for the concrete screws allows the screw to be unscrewed twice to place maximum 10 mm packing below the base plate head or to align the attached part, and then to tighten the screw again.
  • The checking gauge allows for reuse in temporary fixings (e.g. inclined supports) covered by the national approval.

Available Product Variants

Application and Permission

  • Guard rails
  • Consoles/Base plates
  • Metal profiles
  • Shelving systems
  • Protection barriers
  • Results / beam anchors
  • Temporary anchoring, e.g. of building site equipment
  • Shuttering props
Building materials
Approved for:
  • Concrete C20/25 to C50/60, cracked and non-cracked
Also suitable for:
  • Concrete C12/15
  • Solid building materials
  • Masonry with a dense structure
* You can find detailed information on building materials in the registration document.


  • ETA-15/0352
  • DoP No. 0078
  • DoP No. 0146
  • Z-21.8-2049
For Details see corresponding Documents

Assembly Instruction

  • The ULTRACUT FBS II is recommended for the push-through installation.
  • Drill holes do not need to be cleaned during vertical installation (ceiling and floor). For floor fixings the hole must be drilled 3x drill hole diameter deeper.
  • We recommend using a tangential impact screwdriver with a suitable impact screwdriver socket or an internal torx drive.
  • The screw is installed correctly when the screw head sits flush on the fixture and cannot be screwed in deeper (visual setting control).
Show assembly instruction as PDF

Documents for Downloading


Title Type Created Valid Till
ETA - European Technical Assessment (PDF, 3 MB) European Technical Assessment for fischer concrete screw ULTRACUT FBS II ETA-15/0352 14-04-2020
DOP - Declaration of Performance (PDF, 2 MB) DoP No. 0078 19-04-2016
DOP - Declaration of Performance (PDF, 3 MB) DoP No. 0146 06-11-2018
DIBt, National German Approval (PDF, 1 MB) Z-21.8-2049 13-07-2016 13-07-2021

System Components & Related Categories