What's New 🔥ICCONS UNI-BOLT™, The Compliant Solution for Hollow Section Steel Connections with limited access

29 September 2026
What's New 🔥ICCONS UNI-BOLT™, The Compliant Solution for Hollow Section Steel Connections with limited access
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Introducing UNI-BOLT™, the blind fastener for hollow steel connections with limited access.

Traditional ways of connecting hollow section steel, like drilling and tapping, strapping, welding, or through-bolting can be slow and awkward when access is limited, driving up installation time and labour costs.

ICCONS® UNI-BOLT™ makes the job simpler: drill, insert, and tighten. This faster installation method reduces labour costs while still delivering a neat, clean finish. UNI-BOLT™ is also ETA assessed and can be designed to AS 4100 (Steel Structures Standard), giving designers and users confidence in its performance.



The expanding sleeve provides high-strength connections and allows installation from one side only, which is ideal for tight or restricted-access areas. It installs with just a standard spanner and torque wrench, and works with rectangular, square, and circular hollow sections.



Key Features of UNI-BOLT™

  • Best approved performance
  • ETA assessed
  • High shear and tensile load capacities
  • Lowest labour costs
  • Easy to use
  • All sections and shapes
  • Aesthetic finish
  • Ideal for combined loads
  • Corrosion resistant

Applications

  • Structural steel hollow section connections
  • Handrail and balustrade fixing
  • Steelwork with restricted access
  • Glazing and facade bracket fixing
  • General structural steel fabrication and connections

UNI-BOLT™ Ready Reckoner

Installation: UNI-BOLT™ Vs Other Fixings


UNI-BOLT™ DRILLING & TAPPING STRAPPING THRU BOLTING WELDING
    1. Drill clearance holes
    1. Drill pilot holes
    1. Place plate and bolts around one side
    1. Drill clearance holes
    1. Prepare surfaces to weld
    2. Insert UNI-BOLT™
    2. Tap holes
    2. Place plate on other side and align bolts
    2. Drill clearance holes other side
    2. Position welding equipment
    3. Tighten UNI-BOLT™
    3. Connect bolts
    3. Connect nuts and washers
    3. Connect bolts through aligned holes
    3. Perform weld
    4. Tighten bolts to torque
    4. Tighten equally to avoid twisting
    4. Tighten bolts to torque
    4. Leave to cool (under supervision)
    5. Weak connection
    5. Perform proof test on the weld

Takeaways and Benefits of UNI-BOLT™

The ICCONS® UNI-BOLT™ is an ETA-assessed, NCC-compliant blind fastener. It provides engineers, builders, and installers with a fast and structurally compliant method of connecting hollow steel sections. With multiple finish options and a simple installation process, UNI-BOLT™ is a modern, ideal alternative to welding or traditional bolting in hard-to-reach areas.

UNI-BOLT™ Range Overview

  • UNI-BOLT™ it comes in multiple lengths per size (varies by SKU), making it suitable for nearly any application.
  • Diameters from M8 to M20
  • Fixing ranges from 5mm to over 90mm
  • Available in a Hot Dipped Galvanised finish, UNI-BOLT™ delivers a durable solution for harsh environments

Galvanised
Item No.		 Item
Description		 Set Screw
Length (mm)		 Clearance
(mm)		 Fixing Range
(mm)		 Torque
(Nm)		 Inner Box
Qty		 Outer Box
Qty
UNIBH-M08050G UNI-BOLT™ M8 X 50 - ETA 50 14 5-26 25 25 120
UNIBH-M08070G UNI-BOLT™ M8 X 70 - ETA 70 14 26-46 25 20 120
UNIBH-M08090G UNI-BOLT™ M8 X 90 - ETA 90 14 46-66 25 20 120
UNIBH-M10050G UNI-BOLT™ M10 X 50 - ETA 50 18 5-22 45 20 120
UNIBH-M10070G UNI-BOLT™ M10 X 70 - ETA 70 18 22-42 45 20 120
UNIBH-M10090G UNI-BOLT™ M10 X 90 - ETA 9018 42-62 45 20 120
UNIBH-M12055G UNI-BOLT™ M12 X 55 - ETA 55 20 5-25 80 20 80
UNIBH-M12080G UNI-BOLT™ M12 X 80 - ETA 80 20 23-50 80 20 80
UNIBH-M12100G UNI-BOLT™ M12 X 100 - ETA 100 20 48-70 80 20 80
UNIBH-M16075G UNI-BOLT™ M16 X 75 - ETA 75 26 8-35 190 10 60
UNIBH-M16100G UNI-BOLT™ M16 X 100 - ETA 100 26 35-60 190 10 60
UNIBH-M16120G UNI-BOLT™ M16 X 120 - ETA 120 26 60-80 190 10 60
UNIBH-M20100G UNI-BOLT™ M20 X 100 - ETA 100 33 12-43 300 5 30
UNIBH-M20120G UNI-BOLT™ M20 X 120 - ETA 120 33 43-63 300 5 30
UNIBH-M20150G UNI-BOLT™ M20 X 150 - ETA 150 33 63-93 300 5 30

UNI-BOLT™ FAQ

1. What is ICCONS® UNI-BOLT™?
ICCONS® UNI-BOLT™ is an ETA-assessed structural blind fastener for rectangular, square and circular hollow section steel. Its expanding sleeve creates a strong geometric interlock from one side only, making it ideal where access is limited. 

2. Where is UNI-BOLT™ used in structural steel?
UNI-BOLT™ is used for hollow section steel connections in building, facades, handrails, glazing, production lines, stadiums, civil infrastructure and solar frameworks – anywhere a fast, compliant hollow section connection is required.

3. Is UNI-BOLT™ compliant with Australian standards?
Yes. UNI-BOLT™ is ETA 25/0374 assessed, NCC™ National Code Compliant and suitable for design in accordance with AS 4100 Steel Structures, giving engineers confidence in structural performance and compliance. 

4. How does UNI-BOLT™ install compared to welding or thru-bolting?
UNI-BOLT™ installs in three steps – drill a clearance hole, insert the UNI-BOLT™, tighten to the specified torque. Unlike welding, drilling and tapping or strapping, there is no hot work, no tapping and no need for access to both sides of the steel section. 

5. What sizes and finishes are available?
The UNI-BOLT™ range covers M8 to M20 in multiple lengths and fixing ranges, in a Hot Dipped Galvanised finish, it delivers a durable solution for harsh environments.

6. What tools do I need to install UNI-BOLT™?
UNI-BOLT™ can be installed with a standard spanner and torque wrench. ICCONS® recommends the ATW40200N 1/2" Industrial Adjustable Torque Wrench (40–200 Nm) for accurate torque on site.

7. Is UNI-BOLT™ available now?
Yes! Available now through authorised ICCONS® distributors.

8. Where to Buy UNI-BOLT™ fasteners in Australia
You can purchase ICCONS® UNI-BOLT™ fasteners through authorised ICCONS® distributors across Australia. Use the ICCONS® online Store Locator to find your nearest distributor.

For more information, contact ICCONS® engineers or explore our comprehensive design tools and technical resources. 

Note: ICCONS® has taken extreme care in compiling the above information. ICCONS® may change our products at any time as may our competitors. ICCONS® believe the information is true and correct as of the date of this article.