What are blind rivets used for?

Blind rivets are used to join materials when access is only available from one side. They are commonly used in manufacturing, construction, and automotive applications.

What is the difference between blind rivets and structural blind rivets?

Structural blind rivets offer higher strength and vibration resistance than standard blind rivets, making them suitable for heavy-duty applications.

When should I use lockbolts?

Lockbolts are used in applications exposed to heavy loads, vibration, and harsh environments where permanent fastening is required.

What are rivet nuts used for?

Rivet nuts create strong threaded connections in thin materials where traditional threading methods are not practical.

Does Top Fasteners supply products Australia-wide?

Yes. Top Fasteners supplies industrial fasteners throughout Melbourne, Victoria, and across Australia.

Home Structural Blind Rivets When and Why to Use Duo-Lock Structural Blind Rivets Instead of Standard Blind Rivets

When and Why to Use Duo-Lock Structural Blind Rivets Instead of Standard Blind Rivets

In many industrial applications, a standard blind rivet simply isn’t strong enough. When a joint is subjected to heavy loads, vibration, impact or fatigue, a structural blind rivet provides a much stronger and more reliable fastening solution.

Top Fasteners’ Duo-Lock Structural Blind Rivets are designed for demanding applications where high shear strength, high tensile strength and secure mandrel retention are essential.

They are a direct equivalent to Hemlok™ and Orlock™ structural blind rivets, making them an excellent alternative for manufacturers and maintenance teams looking for proven structural performance.

What Is a Structural Blind Rivet?

Unlike a conventional blind rivet, a structural blind rivet is specifically engineered to carry higher loads and withstand harsh operating conditions.

Duo-Lock rivets feature:

✔ Mechanical mandrel locking
✔ High clamp force
✔ Excellent vibration resistance
✔ High shear and tensile strength
✔ Secure, permanent installation

These features make them suitable for structural applications where safety and durability are critical.

When Should You Use Duo-Lock Structural Blind Rivets?

1. Heavy-Duty Assemblies

Whenever the joint carries significant loads, structural blind rivets are often the preferred solution.

Typical applications include:

✔ Truck body manufacturing
✔ Trailer construction
✔ Bus body assembly
✔ Commercial vehicle fabrication
✔ Agricultural equipment
✔ Mining machinery

These industries demand fasteners capable of maintaining joint integrity under constant loading.

2. High Vibration Environments

Vibration is one of the biggest causes of fastener failure.

Applications such as:

✔ Transport equipment
✔ Mining vehicles
✔ Construction machinery
✔ Rail equipment
✔ Industrial machinery

can loosen ordinary fasteners over time.

The mechanical mandrel locking system used in Duo-Lock rivets helps maintain joint integrity even under continuous vibration.

3. Structural Steel and Aluminium Fabrication

Structural blind rivets are ideal where welding is undesirable or impractical.

Benefits include:

✔ No heat distortion
✔ No repainting after installation
✔ Faster assembly
✔ Access required from only one side

This makes them suitable for joining:

✔ Steel sections
✔ Aluminium extrusions
✔ Sheet metal panels
✔ Structural frames

4. Blind Installation

Many assemblies only allow access from one side.

Examples include:

✔ Closed box sections
✔ Tubular frames
✔ Vehicle pillars
✔ Enclosures
✔ Machine frames

Duo-Lock structural blind rivets provide structural fastening without requiring access to the rear of the joint.

Why Choose Duo-Lock Instead of Standard Blind Rivets?

Higher Shear Strength

Structural blind rivets are designed to withstand significantly greater shear loads than conventional blind rivets.

This is particularly important where loads act across the joint.

Higher Tensile Strength

Where joints are subjected to pulling forces, Duo-Lock rivets provide much greater resistance to failure.

Positive Mandrel Locking

Unlike ordinary blind rivets, the mandrel is mechanically retained within the rivet body.

Benefits include:

✔ Increased strength
✔ Improved vibration resistance
✔ Reduced risk of mandrel movement
✔ Improved long-term reliability

Improved Fatigue Performance

Repeated loading can eventually loosen or weaken conventional fasteners.

Structural blind rivets are specifically designed for applications involving:

✔ Dynamic loading
✔ Continuous vibration
✔ Shock loading
✔ Fatigue stresses

Permanent Structural Joint

Duo-Lock rivets produce a secure permanent joint suitable for demanding industrial applications.

Duo-Lock vs Standard Blind Rivets

Feature	Duo-Lock Structural Rivets	Standard Blind Rivets
Shear Strength	Excellent	Moderate
Tensile Strength	Excellent	Moderate
Vibration Resistance	Excellent	Good
Mechanical Mandrel Lock	Yes	Usually No
Structural Applications	Excellent	Limited
Heavy-Duty Equipment	Excellent	Limited
Blind Installation	Yes	Yes

Direct Equivalent to Hemlok™ and Orlock™

Many manufacturers specify Hemlok™ or Orlock™ structural blind rivets because of their excellent structural performance.

Top Fasteners’ Duo-Lock Structural Blind Rivets provide a direct equivalent fastening solution, offering comparable installation characteristics and structural performance for many applications.

If your engineering specification allows equivalent structural rivets, Duo-Lock can provide a reliable and cost-effective alternative.

Always confirm that the selected rivet meets your engineering, load and specification requirements before substituting products.

Industries That Benefit from Duo-Lock Structural Rivets

Duo-Lock rivets are widely used in:

✔ Truck and trailer manufacturing
✔ Bus body construction
✔ Mining equipment
✔ Agricultural machinery
✔ Railway equipment
✔ Construction machinery
✔ Heavy transport
✔ Industrial fabrication
✔ Sheet metal engineering

Choosing the Right Structural Rivet

When selecting a structural blind rivet, consider:

✔ Material type
✔ Material thickness
✔ Required shear load
✔ Required tensile load
✔ Corrosion resistance
✔ Head style
✔ Rivet diameter

Choosing the correct rivet ensures maximum joint strength and long service life.

Conclusion

When applications demand greater strength, higher vibration resistance and long-term durability, Duo-Lock Structural Blind Rivets offer significant advantages over standard blind rivets.

With high structural performance, positive mandrel retention and blind installation, Duo-Lock rivets are ideal for heavy-duty manufacturing, transport, mining and industrial applications.

As a direct equivalent to Hemlok™ and Orlock™ structural blind rivets, Duo-Lock provides manufacturers with a dependable fastening solution for demanding structural assemblies.

If you’re unsure which structural blind rivet best suits your application, contact the fastening specialists at Top Fasteners for expert advice.