Product Description
Hollo-Bolt expansion bolts require access to only one side of the Structural Hollow Section (SHS), and offer a faster alternative to welding or through-bolting, enabling contractors to reduce construction time and labour costs. Installation is quickly carried out by inserting into pre-drilled steelwork and tightening with a torque wrench. Also suitable for blind connections where access is available from one side only. The 'Flush Fit Head' version also ensures zero visible protrusion creating an opportunity for architectural design as the head is completely flush with the steelwork and discreet.
Supplied with an innovative installation nut allowing the Flush Fit to be installed without the requirement of specialist skills or equipment.
The fixing is available in sizes M8, M10 and M12.
- Zero visible head protrusion.
- Fast, cost saving installation from one side.
- For square, rectangular and circular hollow sections.
- High resistance to shear and tension.
- Low temperature tested to -45°C (carbon steel variants).
- Other head types available.
- New Hollo-Bolt plug-in tool available to download within Tekla Warehouse.
| Product Code | Countersunk Bolt Ø | Length | Clamping Thickness | Outer Ply | Sleeve Outer Ø | Ø | Installation Nut | Tightening Torque | Tensile | Single Shear |
|---|---|---|---|---|---|---|---|---|---|---|
| Z | B | W | min t | S | D | A/F | ||||
| mm | mm | mm | mm | mm | mm | Nm | kN | kN | ||
| HBFF08-1 | M8 | 50 | 10 - 27 | 8 | 13.75 | 24 | 19 | 23 | 4.0 | 5.0 |
| HBFF08-2 | M8 | 70 | 27 - 45 | 8 | 13.75 | 24 | 19 | 23 | 4.0 | 5.0 |
| HBFF08-3 | M8 | 90 | 45 - 64 | 8 | 13.75 | 24 | 19 | 23 | 4.0 | 5.0 |
| HBFF10-1 | M10 | 50 | 12 - 27 | 10 | 17.75 | 30 | 24 | 45 | 8.5 | 10.0 |
| HBFF10-2 | M10 | 70 | 27 - 45 | 10 | 17.75 | 30 | 24 | 45 | 8.5 | 10.0 |
| HBFF10-3 | M10 | 90 | 45 - 64 | 10 | 17.75 | 30 | 24 | 45 | 8.5 | 10.0 |
| HBFF12-1 | M12 | 55 | 12 - 30 | 10 | 19.75 | 33 | 30 | 80 | 10.5 | 15.0 |
| HBFF12-2 | M12 | 80 | 30 - 52 | 10 | 19.75 | 33 | 30 | 80 | 10.5 | 15.0 |
| HBFF12-3 | M12 | 100 | 52 - 74 | 10 | 19.75 | 33 | 30 | 80 | 10.5 | 15.0 |
