Our Concrete Screwbolts, also known as Thunderbolts, offer a strong, stress-free anchoring solution for solid substrates such as concrete, brick, and block. These heavy-duty fixings cut their own thread during installation, eliminating the need for plugs, expansion, or resin systems.
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Thread Sizes:
M8 and M8/M10 dual-thread variants available -
Available Brands:
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Fischer – Known for precision and performance in concrete fixings
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Applications:
Ideal for bracketry, base plates, support frameworks, and threaded rod anchoring. These screws provide a secure hold without causing expansion stress, making them suitable for edge fixing and reduced embedment depths.
The Concrete Screwbolt range is trusted by installers for its quick installation, reusability in some applications, and high load-bearing capability.
For more information or to discuss your specific requirements, please contact us at sales@directchannel.uk.com or call 0121 270 8507.
Showing 1–20 of 25 results
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M8 Fischer FBS 6x35mm Male Threaded Concrete Screw
M8 Fischer FBS 6x35mm Male Concrete Screw Used to suspended pipes, unistrut, cable containment and ductwork systems from prestressed concrete ceilings. Bright Zinc Plated (BZP) 6mm Drill hole diameter x Minimum drill hole depth 45mm External Threaded M8x19mm Stud length Embedment 35mm ETA / CE Approved Fire Resistance Classification: R120 Equivalent to Hilti HUS3 Range Fischer Product Code: 523913 (FBS 6x35 M8/15) Sold IndividuallyCode: FBS6X35M.Q1 £0.49 ex. VAT
£0.59 inc. VAT -
Sale!
M8/M10 Dual Thread 6x35mm Female Concrete Screw (Pack of 50) – Strut Fix
M8 Fischer FBS 6x35mm Male Concrete Screw Used to suspended pipes, unistrut, cable containment and ductwork systems from prestressed concrete ceilings. Bright Zinc Plated (BZP) 6mm Drill hole diameter x Minimum drill hole depth 45mm External Threaded M8x19mm Stud length Embedment 35mm ETA / CE Approved Fire Resistance Classification: R120 Equivalent to Hilti HUS3 Range Fischer Product Code: 523913 (FBS 6x35 M8/15) Sold IndividuallyCode: FCS6X35.Q50 Original price was: £14.09.£12.92Current price is: £12.92. ex. VAT
£15.50 inc. VAT -
M8/M10 Fischer Dual Thread 6x35mm Female Concrete Screw
M8/M10 Dual Thread Fischer FBS 6x35mm Female Concrete Screw Used to suspended pipes, unistrut, cable containment and ductwork systems from prestressed concrete ceilings. M10 Dual Internal Threaded Connection Nut - Takes Both M8 and M10 Thread Bright Zinc Plated (BZP) 6mm Drill hole diameter x Minimum drill hole depth 45mm Projection length 26.5mm Embedment 35mm ETA / CE Approved Fire Resistance Classification: R120 Equivalent to Hilti HUS3 Range Fischer Product Code: 523912 (FBS 6x35 M8/M10I) Sold IndividuallyCode: FBS6X35F.Q1 £0.63 ex. VAT
£0.76 inc. VAT -
M8 Fischer FBS 6x55mm Male Threaded Concrete Screw
M8 Fischer FBS 6x55mm Male Concrete Screw Bright Zinc Plated (BZP) 6mm Drill hole diameter x Minimum drill hole depth 65mm External Threaded M8x19mm Stud length Embedment 55mm ETA / CE Approved Fire Resistance Classification: R120 Equivalent to Hilti HUS3 Range Fischer Product Code: 066949 (FBS 6x55 M8/19) Sold IndividuallyCode: FBS6X55M.Q1 £0.56 ex. VAT
£0.67 inc. VAT -
Sale!
M8/M10 Dual Thread 6x55mm Female Concrete Screw (Pack of 50) – Strut Fix
M8 Fischer FBS 6x35mm Male Concrete Screw Used to suspended pipes, unistrut, cable containment and ductwork systems from prestressed concrete ceilings. Bright Zinc Plated (BZP) 6mm Drill hole diameter x Minimum drill hole depth 45mm External Threaded M8x19mm Stud length Embedment 35mm ETA / CE Approved Fire Resistance Classification: R120 Equivalent to Hilti HUS3 Range Fischer Product Code: 523913 (FBS 6x35 M8/15) Sold IndividuallyCode: FCS6X55.Q50 Original price was: £15.91.£14.17Current price is: £14.17. ex. VAT
£17.00 inc. VAT -
M8/M10 Fischer Dual Thread 6x55mm Female Concrete Screw
Fischer M8/M10 Dual Threaded Female Concrete Screws (6x55) Used to suspended pipes, unistrut, cable containment and ductwork systems from prestressed concrete ceilings. M10 Dual Internal Threaded Connection Nut - Takes Both M8 and M10 Thread Bright Zinc Plated (BZP) 6mm Drill hole diameter x Minimum drill hole depth 65mm Projection length 26.5mm Embedment 55mm ETA / CE Approved Fire Resistance Classification: R120 Equivalent to Hilti HUS3 Range Fischer Product Code: 066950 (FBS 6x55 M8/M10I) Sold IndividuallyCode: FBS6X55F.Q1 £0.63 ex. VAT
£0.76 inc. VAT -
M6 x 50mm Flanged Concrete Screw Bolt – Zinc Plated Hex Head Anchor
Code: R-LX-06X050-HF-ZP £0.17 ex. VAT- Anchor Diameter: 7.5mm
- Anchor Length: 50mm
- Head Type: Hex head with integral flange – ideal for oversized holes
- Hole Diameter Required: 9mm
- Max Fixture Thickness: 7mm
- Zinc plated finish for corrosion resistance
- Reusable and fully removable
- Ideal for cracked/uncracked concrete and natural stone (after testing)
£0.20 inc. VAT -
M6 x 75mm Flanged Concrete Screw Bolt – Zinc Plated Hex Head
Code: R-LX-06X075-HF-ZP £0.21 ex. VAT- Anchor Diameter: 7.5mm
- Anchor Length: 75mm
- Head Type: Hex head with integrated flange
- Hole Diameter Required: 9mm
- Max Fixture Thickness: 32mm
- Zinc plated finish for corrosion resistance
- Safe for use near edges – non-expansion design
- Removable and reusable for temporary or permanent fixings
- Compatible with cracked/uncracked concrete and natural stone (site tested)
£0.25 inc. VAT -
M6 x 100mm flanged concrete screw bolt
Code: R-LX-06X100-HF-ZF £0.36 ex. VAT-
Key Features:
- Anchor Diameter: 7.5mm
- Anchor Length: 100mm
- Head Type: Hex head with integrated flange
- Hole Diameter Required: 9mm
- Max Fixture Thickness: 57mm
- Material: Carbon steel with zinc plated finish
- Non-expansion design – safe for edge and grouped fixings
- Removable and reusable – great for temporary anchorages
- High performance in cracked and uncracked concrete
£0.43 inc. VAT -
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M6 x 130mm flanged concrete screw bolt
Code: R-LX-06X130-HF-ZF £0.38 ex. VAT-
Key Features:
- Anchor Diameter: 7.5mm
- Anchor Length: 130mm
- Head Type: Hex head with integrated flange
- Hole Diameter Required: 9mm
- Max Fixture Thickness: 87mm
- Material: Carbon steel, zinc plated
- Non-expansion design – safe for edge fixing
- Fully removable and reusable for temporary or permanent installations
- Certified for cracked and uncracked concrete and site-tested stone
£0.46 inc. VAT -
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M6 x 150mm flanged concrete screw bolt
Code: R-LX-06X150-HF-ZF £0.44 ex. VAT-
Key Features:
- Anchor Diameter: 7.5mm
- Anchor Length: 130mm
- Head Type: Hex head with integrated flange
- Hole Diameter Required: 9mm
- Max Fixture Thickness: 87mm
- Material: Carbon steel, zinc plated
- Non-expansion design – safe for edge fixing
- Fully removable and reusable for temporary or permanent installations
- Certified for cracked and uncracked concrete and site-tested stone
£0.53 inc. VAT Read more -
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Fischer FBS II Ultracut 8 x 70mm Concrete Screw (Box of 50)
FBS II Ultracut Concrete Screw 8 x 70mm Simply Drill and Drive - Time Efficient installation through streamlined procedure Specialized Saw Tooth Geometry Allowing To Cut Quickly Into Concrete Dimensions - 8mm x 70mm Use Drill Hole Diameter 8mm Fischer Product Code: 536852 (FBS II 8x70 20/5) Sold as Box of 50Code: FBS870 £43.79 ex. VAT
£52.55 inc. VAT -
Fischer FBS II Ultracut 8 x 80mm Concrete Screw (Box of 50)
FBS II Ultracut Concrete Screw 8 x 80mm Dimensions - 8mm x 80mm Use Drill Hole Diameter 8mm For Use With Concrete, Brick and Block Fischer Product Code: 536853 (FBS II 8x80 30/15) Sold as Box of 50Code: FBS880 £46.29 ex. VAT
£55.55 inc. VAT -
Fischer FBS II Ultracut 8 x 90mm Concrete Screw (Box of 50)
FBS II Ultracut Concrete Screw 8 x 90mm Dimensions - 8mm x 90mm Use Drill Hole Diameter 8mm Zinc Plated Steel ETA / CE Approved For Use With Concrete, Brick and Block Fischer Product Code: 536854 (FBS II 8x90 40/25) Sold as Box of 50Code: FBS890 £48.93 ex. VAT
£58.72 inc. VAT -
Fischer FBS II Ultracut 8 x 110mm Concrete Screw (Box of 50)
FBS II Ultracut Concrete Screw 8 x 110mm Dimensions - 8mm x 110mm Use Drill Hole Diameter 8mm Zinc Plated Steel ETA / CE Approved For Use With Concrete, Brick and Block Fischer Product Code: 536856 (FBS II 8x110 60/45) Sold as Box of 50Code: FBS8110 £57.14 ex. VAT
£68.57 inc. VAT -
Fischer FBS II Ultracut 8 x 130mm Concrete Screw (Box of 50)
FBS II Ultracut Concrete Screw 8 x 130mm Dimensions - 8mm x 130mm Use Drill Hole Diameter 8mm Zinc Plated Steel ETA / CE Approved For Use With Concrete, Brick and Block Fischer Product Code: 536857 (FBS II 8x130 80/65) Sold as Box of 50Code: FBS8130 £60.00 ex. VAT
£72.00 inc. VAT -
Fischer FBS II Ultracut 10 x 70mm Concrete Screw (Box of 50)
FBS II Ultracut Concrete Screw 10 x 70mm Dimensions - 10mm x 70mm Use Drill Hole Diameter 10mm Zinc Plated Steel ETA / CE Approved For Use With Concrete, Brick and Block Fischer Product Code: 536859 (FBS II 10x70 15/5) Sold as Box of 50Code: FBS1070 £63.14 ex. VAT
£75.77 inc. VAT -
Fischer FBS II Ultracut 10 x 90mm Concrete Screw (Box of 50)
FBS II Ultracut Concrete Screw 10 x 90mm Dimensions - 10mm x 90mm Use Drill Hole Diameter 10mm Zinc Plated Steel ETA / CE Approved For Use With Concrete, Brick and Block Fischer Product Code: 536861 (FBS II 10x90 35/25/5) Sold as Box of 50Code: FBS1090 £70.59 ex. VAT
£84.71 inc. VAT -
Fischer FBS II Ultracut 10 x 100mm Concrete Screw (Box of 50)
FBS II Ultracut Concrete Screw 10 x 100mm Dimensions - 10mm x 100mm Use Drill Hole Diameter 10mm Zinc Plated Steel ETA / CE Approved For Use With Concrete, Brick and Block Fischer Product Code: 536862 (FBS II 10x100 45/35/15) Sold as Box of 50Code: FBS10100 £74.72 ex. VAT
£89.66 inc. VAT -
Fischer FBS II Ultracut 10 x 120mm Concrete Screw (Box of 50)
FBS II Ultracut Concrete Screw 10 x 120mm Dimensions - 10mm x 120mm Use Drill Hole Diameter 10mm Zinc Plated Steel ETA / CE Approved For Use With Concrete, Brick and Block Fischer Product Code: 536863 (FBS II 10x120 65/55/35) Sold as Box of 50Code: FBS10120 £82.86 ex. VAT
£99.43 inc. VAT
