The Blind Bolt has an innovative and unique design. This means that anyone using them has to be aware of exactly how the dimensions of the bolts are measured, and the way in which these measurements are used during fitting.

On the menu above you’ll see a pictorial representation of these measurements, while the details are set out below.

If you have further questions on the fixing terms of Blind Bolts please get in touch with us.

Use the contact details at the bottom of the page or click here to send us an email.

The Minimum Fixing Thickness

Minimum fixing thickness refers to the minimum distance which the bolt can fix. The combined thickness of the substances being fixed is used to produce this figure.

The Maximum Fixing Thickness

Maximum fixing thickness refers to the maximum distance which the bolt can fix. The combined thickness of the substances being fixed is used to produce this figure.

The Anchor Clearance

Anchor clearance refers to the minimum distance required if the Blind Bolt anchor is to be deployed effectively. This particular measurement has to be carefully noted in order to ensure that the anchor doesn’t catch on the section wall in question.

Depth Clearance

Depth clearance is the minimum space needed inside a cavity wall in order for the anchor on the Blind Bolt to be deployed effectively. This particular measurement has to be carefully noted in order to ensure that the bolt doesn’t hit the section wall opposite before deployment of the anchor.

The Hole Centres

‘Hole centres’ is a reference to the minimum distance needed between the holes being drilled when multiple Blind Bolts are being used.