Type HB Hollo-Bolt™ Countersunk Head
Hollo-Bolt Countersunk Head is an expansion bolt that only requires installation access from one side of the Hollow Structural Section (HSS)
Overview
Hollo-Bolt expansion bolts require installation access to only one side of the Hollow Structural Section (HSS), and offer a faster alternative to welding or through-bolting, enabling contractors to reduce construction time and labor costs. Installation is quickly carried out by inserting into pre-drilled steel and tightening with a torque wrench. Also suitable for blind connections where access is available from one side only. The 'Countersunk Head' version also ensures that the fixing protrusion from the steel is kept to a minimum whilst still using a plain drilled hole in the supporting section and the outer plate / bracket.
The larger 5⁄8" Hollo-Bolts are optimized for high strength structural connections and feature a unique High Clamping Force (HCF) mechanism for superior performance.
Features & Benefits
- Minimal visible head protrusion.
- Fast, cost saving installation from one side.
- For square, rectangular and circular hollow sections.
- High resistance to tensile and shear loads.
- High Clamping Force design (size 5⁄8").
- Low temperature tested to -50°F (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 | Bolt Ø | Height | Length | Clamping Thickness | Outer Ply | Sleeve Outer Ø | Ø | Tightening Torque | Tensile | Single Shear | |
| Z | H | B (max) | W | min t | S | D | A/F | ||||
| mm | mm | mm | mm | mm | mm | mm | Nm | kN | kN | ||
| LHBM08CSK#1 | M8 | 5 | 45 | 3 - 22 | - | 13.75 | 22 | 19 | 23 | 4.0 | 5.0 |
| LHBM08CSK#2 | M8 | 5 | 65 | 22 - 41 | - | 13.75 | 22 | 19 | 23 | 4.0 | 5.0 |
| LHBM08CSK#3 | M8 | 5 | 85 | 41 - 60 | - | 13.75 | 22 | 19 | 23 | 4.0 | 5.0 |
| LHBM10CSK#1 | M10 | 6 | 44 | 3 - 22 | - | 17.75 | 29 | 24 | 45 | 8.5 | 10.0 |
| LHBM10CSK#2 | M10 | 6 | 64 | 22 - 41 | - | 17.75 | 29 | 24 | 45 | 8.5 | 10.0 |
| LHBM10CSK#3 | M10 | 6 | 84 | 41 - 60 | - | 17.75 | 29 | 24 | 45 | 8.5 | 10.0 |
| LHBM12CSK#1 | M12 | 7 | 48 | 3 - 25 | - | 19.75 | 32 | 30 | 80 | 10.5 | 15.0 |
| LHBM12CSK#2 | M12 | 7 | 73 | 25 - 47 | - | 19.75 | 32 | 30 | 80 | 10.5 | 15.0 |
| LHBM12CSK#3 | M12 | 7 | 93 | 47 - 69 | - | 19.75 | 32 | 30 | 80 | 10.5 | 15.0 |
| High Clamping Force | |||||||||||
| LHBM16CSK#1 | M16 | 8 | 62 | 12 - 29 | 8 | 25.75 | 38 | 36 | 190 | 21.0 | 30.0 |
| LHBM16CSK#2 | M16 | 8 | 92 | 29 - 50 | 8 | 25.75 | 38 | 36 | 190 | 21.0 | 30.0 |
| LHBM16CSK#3 | M16 | 8 | 112 | 50 - 71 | 8 | 25.75 | 38 | 36 | 190 | 21.0 | 30.0 |
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 based on use in S275 structural hollow section and are applicable to the Hollo-Bolt only in both tension and shear. Failure of the section, particularly on those with thin walls and a wide chord face, could occur at a lower figure and its strength should be checked by a qualified Structural Engineer.
| Collar | Safe Working Loads (FOS 5:1) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Product Code | Bolt Ø | Height | Length | Clamping Thickness | Outer Ply | Ø | Tightening Torque | Tensile | Single Shear | |
| Z | H | B | W | min t | D | A/F | ||||
| ft lb | lbs | lbs | ||||||||
| LHBM08CSK#1 | 5⁄16" | 3⁄16" | 13⁄4" | 1⁄8" - 7⁄8" | - | 7⁄8" | 3⁄4" | 17 | 899 | 1124 |
| LHBM08CSK#2 | 5⁄16" | 3⁄16" | 29⁄16" | 7⁄8" - 15⁄8" | - | 7⁄8" | 3⁄4" | 17 | 899 | 1124 |
| LHBM08CSK#3 | 5⁄16" | 3⁄16" | 33⁄8" | 15⁄8" - 23⁄8" | - | 7⁄8" | 3⁄4" | 17 | 899 | 1124 |
| LHBM10CSK#1 | 3⁄8" | 1⁄4" | 13⁄4" | 1⁄8" - 7⁄8" | - | 11⁄8" | 15⁄16" | 33 | 1910 | 2248 |
| LHBM10CSK#2 | 3⁄8" | 1⁄4" | 21⁄2" | 7⁄8" - 15⁄8" | - | 11⁄8" | 15⁄16" | 33 | 1910 | 2248 |
| LHBM10CSK#3 | 3⁄8" | 1⁄4" | 35⁄16" | 15⁄8" - 23⁄8" | - | 11⁄8" | 15⁄16" | 33 | 1910 | 2248 |
| LHBM12CSK#1 | 1⁄2" | 1⁄4" | 17⁄8" | 1⁄8" - 1" | - | 11⁄4" | 13⁄16" | 59 | 2360 | 3372 |
| LHBM12CSK#2 | 1⁄2" | 1⁄4" | 27⁄8" | 1" - 113⁄16" | - | 11⁄4" | 13⁄16" | 59 | 2360 | 3372 |
| LHBM12CSK#3 | 1⁄2" | 1⁄4" | 311⁄16" | 113⁄16" - 23⁄4" | - | 11⁄4" | 13⁄16" | 59 | 2360 | 3372 |
| High Clamping Force | ||||||||||
| LHBM16CSK#1 | 5⁄8" | 5⁄16" | 27⁄16" | 1⁄2" - 11⁄8" | 5⁄16" | 11⁄2" | 17⁄16" | 140 | 4720 | 6744 |
| LHBM16CSK#2 | 5⁄8" | 5⁄16" | 35⁄8" | 11⁄8" - 2" | 5⁄16" | 11⁄2" | 17⁄16" | 140 | 4720 | 6744 |
| LHBM16CSK#3 | 5⁄8" | 5⁄16" | 47⁄16" | 2" - 213⁄16" | 5⁄16" | 11⁄2" | 17⁄16" | 140 | 4720 | 6744 |
• Hollo-Bolts can be used on a variety of steel hollow sections and shapes. Safe working loads shown are based on use in A36 structural tube and are applicable to the Hollo-Bolt only in both tension or shear. Failure of the section could occur at a lower figure and therefore 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.
-
Safer connections
Drilling and welding in the field is avoided, removing the need for hot work permits and encouraging safer site conditions.
-
High strength
Lindapter clamps are manufactured from high strength materials to resist high load requirements and harsh environments.
-
Industry leading approvals
Lindapter has earned a reputation synonymous with safety and reliability, gaining multiple independent approvals.
-
Adjustable
Quickly align steel sections by sliding the section into the correct position before tightening the Girder Clamp to complete the installation.
-
Free connection detailing
Lindapter’s experienced Engineers can detail a custom connection based on your specific requirements free of charge.
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