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Expansion insert, type B-Lok® 841 and 842

Expansion insert, type B-Lok® 841 and 842

Expansion insert with slot, type 841 and 842 with wafle outer geometry for very hard materials.


How does an expansion insert work?


Place the brass expansion insert in the drilled or pre-drilled hole.

Press the expansion insert into the hole until it is flush with the surface of the workpiece. Meanwhile, the expansion insert will get slightly deformed.

Be careful, the legs must not touch each other because then the hole is too small or the receiving material is not elastic enough!

Due to the torque, unleashed on the bolt during assembly, the outer geometry of the expansion insert is pressed into the material and provides a decent pull-out force and torque resistance.

Attention: The bolt must not touch the bottom of the provided hole!

During the first assembly, a one-off locking is also given to the threaded connection.

The version 842 has the extra advantage that in true holes of panels, they can garantuee higher pull-through performances thanks to the collar.