Hollo-Bolt® (Hex Head JS500)

Hollo-Bolt expansion bolts for structural steel are engineered specifically for single-sided connections into Structural Hollow Sections where traditional methods such as through-bolting or welding are not feasible. With the hex head JS500 design, these bolts deliver a High Clamping Force performance, making them an essential choice for structural steel applications that require blind fixing capability in confined spaces.

Key Features

• Single-sided installation – no access is required to the reverse face, simplifying the connection process.
• The High Clamping Force mechanism ensures reliable and consistent performance.
• Suitable for various M16 and M20 applications, especially in demanding structural work.
• Installation is torque-controlled and can be performed using standard wrenches, enhancing usability.
• Tested to withstand fire exposure for up to 120 minutes, adhering to ISO 834 standards.
• This design significantly reduces construction time and labor costs compared to welding or traditional bolting methods.

Typical Applications

The Hollo-Bolt expansion bolts are primarily used in structural steelwork connections across various projects including commercial buildings, infrastructure developments, refurbishment work, and fabrication scenarios where access is limited to one side. They are particularly valuable for efficiently connecting beams, bracing, and secondary members to hollow sections during the assembly and installation phases.

Technical Specification

Each expansion bolt is designed with a hex head drive intended for installation into pre-drilled holes within hollow sections. Specific material and finish specifications can be made available upon request. For detailed load data, installation guidance, or technical documentation, potential customers should reach out to our sales team.