Hollo-Bolt® is the original expansion bolt designed and manufactured by Lindapter since 1985.

It is the only blind fastener for structural steel approved by ICC-ES for combined loads in high seismic regions and Lindapter are the only blind bolt manufacturer to have ICC-ES approvals for its entire range including every size (diameter and length), every finish, corrosion protection and material, every head type (hexagonal, countersunk and flush fit) and of course every seismic design category A through F.

No other expansion or blind bolt can offer this level of approval by ICC-ES!

With the Lindapter Hollo-Bolts steel sections can be connected quickly to pre-drilled Hollow Structural Section (HSS) with no proprietary tools and with access from only one side. This faster alternative to welding or through-bolting enables contractors to reduce construction time and labor costs.

Other features and benefits of Hollo-Bolt include:

• Design for fatigue resistance now included in ESR 3330

• LABC and LARC supplements for Los Angeles now included in ESR 3330

• CBC and CRC supplements for California now included in ESR 3330

• ICC-ES approved for all Seismic Design Categories (A through F)

• Carbon Steel variants independently fire tested per ASTM E-119

• Fast cost saving installation from one side

• Suitable for square, rectangular and circular hollow sections

• High resistance to shear and tension

• Unique High Clamping Force design

• Recognized in the AISC Steel Construction Manual

• Carbon steel variants tested to -50° F

With the most comprehensive ICC-ES approval on the market you can be confident when specifying or installing Lindapter Hollo-Bolt that the product is fit for purpose and will get through planning permission without delays, and won't get rejected on site by building inspectors!