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BoxBolt® Blind Bolt

The blind bolt solution for connecting hollow section steelwork

Overview Benefits Standards Gallery

Giving sight to the blind (connection)

BoxBolt is a fully tested and approved blind fixing solution for connecting hollow section steelwork, or other steel structures where access is restricted to one side only. Their ease of installation eliminates the need for tapping, welding, strapping or through-bolting. BoxBolt fixings are suitable for use with rectangular, square and circular hollow sections. Featuring a hexagon head, BoxBolt can be installed with a standard set of wrenches, or alternatively, by using the unique BoxSok installation tool when assembly time needs to kept to an absolute minimum.

Simple, Safe & Speedy

Simplify connections

BoxBolt expanding bolts are designed to be easily attached from one side only of your steel connection. They provide a safe connection to steel structures without the need for costly and time-consuming welding or a specialist workforce.

Speedy installations

No special tools are required to install BoxBolt – two wrenches are all that is needed, thereby reducing installation costs and time. However, if time spent on-site is a major factor, our unique BoxSok rapid installation tool means that each BoxBolt can be secured in seconds.

Safety guaranteed

Unlike a welded solution, BoxBolt allows you to know exactly what your safe working loads are with a 5:1 safety factor.

Key Features

Quicker to install

With no special tools or installation skills required, BoxBolt can deliver savings in both time and cost on-site.

Tested and approved

BoxBolt is CE certified and approved for use by Lloyds Register (LR) type approval.

Designed to last

BoxBolt components are available in three finishes: zinc plated, galvanised and stainless steel, for long term corrosion resistance in any environment.

Exceptional shear loading performance

Fewer BoxBolt fixings are required to make shear connections, offering greater design flexibility and potential cost reductions.

Video Overview of BoxBolt

KS BB 1073 Medium

Sizes and finishes to suit all applications

A wide range of BoxBolt sizes is available to suit the thickness of the steelwork being connected. Special lengths are also offered for non-standard applications.  BoxBolt connections are available in three finishes: zinc plated, galvanised, and stainless steel.

Clamping down on safety

  • Approved for use by Lloyds Register.

  • Complies with the DIN 18800 and Eurocode 3 design methods for bolted steel connections.

  • CE certified in compliance with Regulation 305/2011/EU of the European Parliament and the Council of 9 March 2011 (the Construction Products Regulation or CPR).

  • The BoxBolt Type C is physically tested with International Accreditation Service certification, which guarantees load value with the correct torque applied, as stated in the Measurements and Specifications.

  • ICC ESR-3217 – BoxBolt is the first blind fastener to achieve ICC Testing and Approval.

  • Acceptance Criteria AC437 – This means all aspects of blind bolting are covered, and the product is safe to use for all blind connections.

BG (1)

Talk to a connection specialist

KS BB 5526 Medium

Technical Support

We offer a full engineering service to support our products, from providing assistance with component selection to a full design capability for large projects.


BoxBolt Applications

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