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M12 Hollo-Bolt® Structural Expansion Bolt

M12 Hollo-Bolt® Structural Expansion Bolt

Avoid the expense and time to create access holes in structural hollow section (SHS). The Hollo Bolt® is a fast and easy solution for fastening SHS when access is limited.

The Hollo Bolt® patented design is the original expansion bolt with real structural properties.The blind bolt system is simply inserted through pre drilled holes and tightened with a torque wrench. M12 Hollo-Bolt can secure up to 69mm of steel material.

  • 8.8 grade hi tensile steel
  • hot dipped galvanised
AS 4100 / NZS 3404
ETA 10/0416
  • Buy 50 for $24.50 each and save 14%
  • Buy 100 for $23.00 each and save 19%
  • Buy 50 for $38.40 each and save 14%
  • Buy 100 for $36.10 each and save 19%
  • Buy 25 for $69.70 each and save 14%
  • Buy 75 for $65.30 each and save 19%
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Size Clamping Thickness Unit(s) EX.GST QTY
Size Clamping Thickness - Pack Qty.- $ Ex. GST -
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Product List
SKU Item Clamping Thickness Clearance Dia. Bx. Qty. Crt. Qty.
SKU 6MHB12-1-HDG Item M12 x 60mm Hollo-Bolt HDG Clamping Thickness 3 - 25 mm Clearance Dia. 20 mm (+1.0 / -0.2) Bx. Qty. 1 Crt. Qty. 50
SKU 6MHB12-2-HDG Item M12 x 80mm Hollo-Bolt HDG Clamping Thickness 25 - 47 mm Clearance Dia. 20 mm (+1.0 / -0.2) Bx. Qty. 1 Crt. Qty. 50
SKU 6MHB12-3-HDG Item M12 x 100mm Hollo-Bolt HDG Clamping Thickness 47 - 69 mm Clearance Dia. 20 mm (+1.0 / -0.2) Bx. Qty. 1 Crt. Qty. 25

National Standards

Design to AS 4100 / NZS 3404 (Steel Structures) and ETA and ICC product certification.

Drill Preparation

Ensure that holes are drilled in both the fixture and the section according to the drilling guidance below. Please note that clearance holes are slightly larger than standard bolt clearance holes to accommodate the sleeve and cone.


  1. Align pre-drilled fixture and section and insert Hollo-Bolt*.
  2. Grip the Hollo-Bolt collar with an open ended spanner.
  3. Using a torque wrench, tighten the central bolt to the recommended torque**.


*Before tightening, ensure that the materials that are to be connected together are touching.

**See product brochure for correct tightening torque. Power tools, such as an impact wrench, may be used to speed up the tightening of the Hollo-Bolt. However, when using power tools, always complete the tightening process with a torque wrench to ensure the correct torque is applied to the Hollo-Bolt.

Hollo-Bolt® and Lindapter® is a registered trademark of Lindapter International.