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Concrete screw with hexagon head and large disc W-BS/S
Highest load capacities and efficient mounting. Ideal for mounting wood structures (large washer as per DIN 440) in concrete, zinc-plated steel
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![](https://media.wuerth.com/source/eshop/stmedia/wuerth/images/std.lang.all/resolutions/category/78px/819973.jpg)
![](https://media.wuerth.com/source/eshop/stmedia/wuerth/images/std.lang.all/resolutions/category/78px/4718153.jpg)
![](https://media.wuerth.com/source/eshop/stmedia/wuerth/images/std.lang.all/resolutions/category/78px/37850891.jpg)
![](https://media.wuerth.com/source/eshop/stmedia/wuerth/images/std.lang.all/resolutions/category/78px/574255612.jpg)
Variants
- Extremely flexible to use due to three anchoring depths
- Fastening can be adjusted up to twice after installation, for example in order to align railings or anchor plates (please refer to the assembly guide)
- Very high loads
- Smallest spacing and edge distance thanks to very low expansion effect
- Very fast and easy assembly and immediately load-bearing
European Technical Assessment ETA-16/0043 for individual fixing point, option 1, cracked and uncracked concrete:
- Static and quasi-static effects
- Seismic exposure, performance categories C1 and C2
- Fire resistance R30, R60, R90, R120
DIBt National technical approval/general type approval Z-21.1-2075 as bonded screw anchor for anchoring in concrete
- Use in combination with injection mortar WIT-BS as bonded screw anchor WIT-BS
- In reinforced and non-reinforced and cracked and uncracked concrete C20/25 to C50/60
From size 8, we recommend the use of a suitable tangential impact screwdriver for installation. The recommended maximum nominal torque must be observed.
![](https://media.wuerth.com/stmedia/wuerth/images/std.lang.all/resolutions/normal/348px/4218607.jpg)
![](https://media.wuerth.com/stmedia/wuerth/images/std.lang.all/resolutions/normal/348px/4332969.jpg)
Adjustment - subsequent aligning possible.
![](https://media.wuerth.com/stmedia/wuerth/images/std.lang.all/resolutions/category/348px/37435254.jpg)
Create the drill hole
![](https://media.wuerth.com/stmedia/wuerth/images/std.lang.all/resolutions/category/348px/12162590.jpg)
Clean the drill hole
![](https://media.wuerth.com/stmedia/wuerth/images/std.lang.all/resolutions/category/348px/12162589.jpg)
Place screw
![](https://media.wuerth.com/stmedia/wuerth/images/std.lang.all/resolutions/category/348px/12162588.jpg)
Screw in the screw
![](https://media.wuerth.com/stmedia/wuerth/images/std.lang.all/resolutions/category/348px/12162587.jpg)
Considered installed when the head is close fitting
![](https://media.wuerth.com/stmedia/wuerth/images/std.lang.all/resolutions/category/348px/12162586.jpg)
Screw out the screw max. 2x each by max. 10 mm. Underlay. Screw in
![](https://media.wuerth.com/stmedia/wuerth/images/std.lang.all/resolutions/category/348px/12162592.jpg)
Considered installed when the head is close fitting. Lining max. 10 mm. The required embedment depth must be maintained as a minimum
![](https://media.wuerth.com/stmedia/wuerth/images/std.lang.all/resolutions/category/348px/3662258.jpg)
Locate the tensioning strand
![](https://media.wuerth.com/stmedia/wuerth/images/std.lang.all/resolutions/category/348px/3662259.jpg)
Mark the tensioning strand and locate the next one
![](https://media.wuerth.com/stmedia/wuerth/images/std.lang.all/resolutions/category/348px/3662260.jpg)
Mark the tensioning strands. Specify the drilling range
![](https://media.wuerth.com/stmedia/wuerth/images/std.lang.all/resolutions/category/348px/3662261.jpg)
Create the drill hole. Observe spacing
![](https://media.wuerth.com/stmedia/wuerth/images/std.lang.all/resolutions/category/348px/3662262.jpg)
Clean the drill hole
![](https://media.wuerth.com/stmedia/wuerth/images/std.lang.all/resolutions/category/348px/3662263.jpg)
Screw in the screw
![](https://media.wuerth.com/stmedia/wuerth/images/std.lang.all/resolutions/category/348px/3662264.jpg)
Considered installed when the head is close fitting. Observe the embedment depth/mirror thickness
European Technical Assessment ETA-16/0043 for individual fixing point, option 1, cracked and uncracked concrete:
- Static and quasi-static effects
- Seismic exposure, performance categories C1 and C2
- Fire resistance R30, R60, R90, R120
DIBt National technical approval/general type approval Z-21.1-2075 as bonded screw anchor for anchoring in concrete
- Use in combination with injection mortar WIT-BS as bonded screw anchor WIT-BS
- In reinforced and non-reinforced and cracked and uncracked concrete C20/25 to C50/60
Individual fixing point with approval:
Normal weight concrete C20/25 to C50/60 (cracked and uncracked concrete)
Especially suitable for fixtures in wooden construction applications in concrete:
- Mounting of e.g. support beams, sleepers, inferior purlins, canopies, wooden substructures, etc.
- Fastenings under seismic conditions in earthquake areas
- Fastenings under exposure to fire
W-BS/S (galvanised steel) may only be used in dry indoor room conditions
For use in concrete < C20/25 and pressure-resistant natural stone (without approval)
Select RAL-colour code
!! NOTE: On-screen visualisation of the colour differs from real colour shade!!