Type HB Hollo-Bolt™ Flush Fit Head
Hollo-Bolt Flush Fit Head is an expansion bolt that only requires access from one side of the Structural Hollow Section (SHS).
Overview
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.
Features & Benefits
- 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.
Approvals
Click on an approval logo to download the certificate or report.
BIM Tools
Click the logo to download the new Hollo-Bolt plug-in tool available in Tekla Warehouse.
Properties
- Manufactured from mild steel or stainless steel grade 316.
- Available with zinc plated or sheraplex finish.
- Reaction to fire: A1 (Steel)
Durability and corrosion protection:
| Corrosivity Class | Electroplated Steel | Sheraplex | Stainless Steel |
| C1 | More than 50 years | More than 50 years | More than 50 years |
| C2 | More than 20 years | More than 50 years | More than 50 years |
| C3 | More than 10 years | More than 20 years | More than 50 years |
For C4 and C5 corrosion categories contact us.
Technical Specification
| Collar | Safe Working Loads (5:1 Factor of Safety) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
For Characteristic Resistances when designing a connection to Eurocode 3, please refer to DoC No.101
For Characteristic Resistances when designing a connection to Eurocode 3, please refer to DoP No.001
• Hollo-Bolts can be used on a wide variety of steel hollow shape sections. Safe working loads shown are applicable to the Hollo-Bolt only in both tension and shear. Failure of the section could occur at a lower figure and its strength should be checked by a qualified Structural Engineer.
How can we
help you?
Reasons to choose Lindapter
-
Save time and money
Clamping two steel sections together avoids time-consuming welding or conventional drilling and bolting.
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Safer connections
On-site drilling and welding is avoided, removing the need for hot work permits and encouraging safer site conditions.
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High strength
Lindapter clamps are manufactured from high strength materials to resist high load requirements and harsh environments.
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Industry leading approvals
Lindapter has earned a reputation synonymous with safety and reliability, gaining multiple independent approvals.
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Adjustable
Quickly align steel sections by sliding the section into the correct position before tightening the Girder Clamp to complete the installation.
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Free connection design
Lindapter’s experienced Engineers can design a bespoke connection based on your specific requirements free of charge.
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