The double coupler securely connects two 48.3mm scaffolding tubes at a fixed 90° angle. This essential load-bearing fitting forms the backbone of stable scaffold structures and is commonly used to join horizontal ledgers to vertical standards, attach handrails, and secure the tops of diagonal braces.
Made from premium drop-forged galvanised steel with a protective zinc coating, these heavy-duty couplers offer excellent strength, superior corrosion resistance, and reliable performance in tough outdoor conditions. Each unit weighs approximately 1.0 kg.
Our double couplers create strong right-angle load-bearing joints between 48.3mm scaffold tubes and work perfectly alongside single couplers for non-load-bearing connections, 360° swivel clamps for diagonal bracing, and scaffolding spanners for quick, secure tightening on site.
Key Features & Benefits
- Drop-forged construction – Delivers superior strength and resistance to deformation compared to pressed fittings.
- Galvanised zinc coating – Protects against rust, corrosion, and weathering for extended service life and reusability.
- Fixed 90° angle – Ensures precise, rigid connections for maximum structural integrity in load-bearing applications.
- High slip resistance – Tested to withstand 6.1 kN without slipping when torqued to 54 Nm.
- BS1139-2.2 compliant – Meets strict British standards for quality, safety, and performance.
- Versatile & reusable – Suitable for a wide range of scaffold configurations and repeated site use.
- Load-bearing performance – Essential for safe, stable frameworks supporting workers, tools, and materials.
Product Specifications
| Specification | Details |
|---|---|
| Product Type | Drop-Forged Double Coupler (Right-Angle / 90-Degree) |
| Tube Compatibility | 48.3mm diameter scaffolding tubes |
| Material | Galvanised steel (zinc-coated) |
| Manufacturing Method | Drop-forged |
| Weight (approx.) | 1.0 kg per coupler |
| Standards Compliance | BS1139-2.2 |
| Slip Resistance | 6.1 kN |
| Torque Tightening | 54 Nm |
| Condition | Brand New |
| Typical Use | Load-bearing connections |
Double Coupler Information
Helpful videos
What is a double coupler?
A double coupler is a fixed scaffolding fitting that connects steel tubes at a 90-degree angle, forming strong, rigid joints for structures such as towers, staging, and handrails.
How does the double coupler compare to other scaffold couplers?
Coupler Type | Angle Flexibility | Load-Bearing | Primary Uses | Best For |
Double Coupler (Fixed/Right-Angle) | Fixed 90° | Yes | Ledgers to standards, handrails to poles, braces | Main structural framework |
Swivel Coupler | Any angle | Limited | Diagonal braces, irregular connections | Flexible bracing |
Single/Putlog Coupler | 90° (single grip) | No | Non-load-bearing transoms to ledgers | Lighter support applications |
Are double couplers suitable for heavy-duty use?
Yes, our drop-forged galvanised double couplers are designed as load-bearing fittings with proven slip resistance of 6.1 kN and compliance with BS1139-2.2, making them reliable for demanding construction, maintenance, and access projects.
How do I install a double coupler correctly?
Position the coupler over both tubes at the desired 90-degree joint, insert the bolts, and tighten to 54 Nm using a scaffold spanner. Always ensure tubes are fully seated and check for a secure grip before loading.
Can I reuse these couplers?
Absolutely, they are built for repeated use with a long lifespan, provided they are inspected for damage before each project.
How many are supplied per bag?
Double couplers are typically supplied in bags of around 25 units.
How can you identify this fitting?
A double coupler features two fixed jaws set at 90 degrees, allowing two scaffold tubes to be inserted and securely tightened using the integrated nuts and bolts.
Are they load-bearing?
Yes. Double couplers are load-bearing fittings, tested to 6.1 kN slip resistance when tightened to 54 Nm.
How are they used in scaffolding?
They are primarily used to connect standards (uprights) to ledgers (horizontal tubes), as well as for bracing, handrails and general scaffold framework construction.
What torque should a double be tightened to?
Double couplers should be tightened to 54 Nm (newton metres) to ensure a secure and reliable connection.
What is the slip resistance of this fitting?
Double couplers offer excellent resistance to tension and slipping, tested to 6.1 kN (kilonewtons) when correctly tightened.
Are they treated or protected?
Yes. Double couplers are galvanised with a zinc coating, providing adequate protection against rust and corrosion in outdoor environments.
How should this fitting be maintained?
Before and after use, inspect the coupler for damage and ensure the bolts tighten correctly. Applying a suitable lubricant to the threads can help maintain smooth operation and extend the fitting’s service life.
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