What Are Blindbolts?

Blindbolts work in a number of different ways. The original Blindbolt is gravity operated with a toggle that rotates around a non-load bearing pivot pin. This bolt is removable and can be used in the horizontal and vertically down positions.

The HD bolt and TW bolts are expansion bolts and are not orientation sensitive so can be used in any position or angle. The HD ( Heavy Duty ) bolt is designed specifically for structural connections and the TW (Thin Wall ) bolt is for light steel frame connections.

Blindbolts are used for fixing in areas of restricted access or in cavities where access to the back face of the connection is not available. They are also designed for connecting into structural hollow sections and light steel frame assemblies. The number of applications is endless and covers any application that requires connecting into a steel section where back face access is difficult or not available.

Blindbolts are simple to install. In the horizontal position, the bolt is inserted into a standard clearance hole and rotated through 180 degrees. The toggle is activated and the bolt can be tightened. For vertical down applications, the bolt is inserted into the clearance hole and spun so that centrifugal force activates the toggle. On M16 and larger an installation gauge is supplied in each box to check the toggle activation before tightening to the recommended torque. For applications where vibration is present, we recommend using a lock nut or washer.

The HD bolt requires the same size hole and when inserted into the hole the activation pin is hammered into the bolt body until flush with the end of the bolt body. The HD bolt can then be tightened to the recommended torque.

The TW bolt is installed by inserting into the clearance hole and then holding the outer hexagonal bolt head with a spanner and then using the bit supplied with a cordless drill to activate the bolt.
Full installation videos are available on our web site.

Only the original Blindbolt is removable. The installation process should be carried out in reverse. A full removal video is available on our web site.