Twist Bolt

Bolt-Products Twist Bolts are amazingly strong, easy to install and long lasting! They come in two diameters, (6mm & 8mm), and multiple lengths, (can be custom made to nearly any length you desire). They can be used in overhanging placements and won’t slip out of the hole allowing glue to stay in place while it cures. Twist Bolts employ both a mechanical advantage as well as a chemical bonding advantage. In reasonable rock we achieve around 50kN at which point the bolt breaks. In fact in an independent test, a bolt was still holding 31,4kN when testing was stopped with only 42mm of embedment. The bolt was glued in using an epoxy rated at 12,4N/mm² in a 12,7mm (½”) hole which with this depth should only hold to 20,78kN.
Obviously either the formula gives incorrect results or there is something special about our bolts.

The answer lies in the unique structure of Bolt Products bolts which allow us to use both mechanical and chemical fastening. Not only does the twisted leg design give outstanding mechanical keying for the glue but a wedging effect is induced internally in the bolt when you try to extract it. As the two legs are not joined at their lower end they slide across each other and wedge into place, roviding an additional mechanical effect along with the normal glue.
Describing Twist Bolts in a word, “BOMBER”!

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Showing all 5 results