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Screw Bolts

Screw Bolts

Lightning Bolts sometimes called Tunderbolts or Screw Bolts  (hexagon head, self-threading)

Medium to heavy duty thread forming bolt fixing

Finish: Zinc yellow passivated screw

Features & benefits

Virtually stress free fixing, allowing close to edge applications.  
The ever popular lightning bolt speeds up installation of most masonry fixing installations.         
Through-fixing, eliminating the need for marking and re-positioning.
High load capacity with interlocking thread into the base material.
Quick and easy to use for many repetitive installations.
Clearance hole is usually 2mm greater than published drill size.
Safe anchoring achieved without the need of high tightening forces.


Widely used for fixing battens, balustrades, handrails, racking and holding down machinery, plus many more installation applications.
Suitable for most masonry substrates including concrete and brickwork but also for hollow block or bricks due to the nature of the thread type anchoring along the total length of the fixing.

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