Type HB - Hollo-Bolt

Suitable for hollow sections, tubes and where access is available from one side only. For corrosion protection the Hollo-Bolt® comes with additional JS500 protection as standard or hot dip galvanised. Sizes M16 and M20 have a patented collapse mechanism for optimised clamping force. Speedy installation with standard tools. Awarded the Design Council’s Millennium Product status for innovation in the year 2000.