Hollo-Bolt

The Type HB Hollo-Bolt® is a product for connecting to square, rectangular or circular structural tube or to conventional steel where access is available from one side only. The Hollo-Bolt® offers a reduction in installation time over traditional connection methods such as welding, drilling and tapping holes or unsightly strapping. The Hollo-Bolt® gives the specifier confidence and peace of mind with guaranteed safe working loads and a 5:1 factor of safety. For aggressive environments the Hollo-Bolt® has a HDG corrosion protection finish, alternatively the product is available in stainless steel.
The patented five part 58" (M16) and 34" (M20) sizes feature a collapse mechanism to maximize clamping force and enable use in primary moment connections.