Scaffolding couplers, also known as scaffolding clamps, which are important in tubular scaffolding systems. They provide fastening and connections between scaffold tubes. The couplers including half couplers, swivel couplers and fixed couplers, as well as forged, cast, and pressed versions. Each type of coupler has unique characteristics. For example:Swivel couplers allow for angle adjustments, while fixed couplers provide rigid connections. Forged couplers are known for their strength and durability, while pressed couplers are cost-effective for large-scale projects.
Scaffolding half couplers are available in various sizes, including OD48.3mm, OD42mm, OD60mm, OD76mm, and OD89mm. The OD48.3mm size is the most commonly used, special for connecting scaffold tubes and poles with an OD48mm standard diameter.
Scaffolding Half Coupler Specifications
|
Item |
Specification |
|
Product Name |
Scaffolding half coupler |
|
Steel Grade |
Q235/Q355 |
|
Dimension |
48.3mm*48.3mm |
|
Standard |
EN74/ BS1139/AS NZS1576/JIS3444 |
|
Weight |
0.98-1.5kg |
|
Type |
Drop Forged,Stamped |
Factory Strength & Production Capability
Irontrix is a direct Steel Planks with Hook factory in China. Our production line covering cutting, welding, surface treatment, assembling and final inspection.
Coupler Scaffolding Type
Single coupler scaffolding
Composed of a single row of vertical tubes and horizontal couplers supported by couplers. Typically featuring only one claw to grip a single tube, the scaffolding can lean against a building for support. It is commonly used for bricklaying.
Double coupler scaffolding
Also known as Right-Angle Couplers, featuring two rows of vertical tubes forming a secure connection. Double coupler scaffolding is the most common choice in construction and industrial maintenance industries.
Scaffold Sleeve Coupler
Used to connect scaffolding tubes in the same direction to extend pipe length. Often features built-in reinforcement to enhance stability with internal components.
Scaffold Swivel Coupler
Connects two scaffolding tubes at varying angles, providing flexibility in scaffold design. Unlike right-angle couplers, swivel couplers are not limited to 90-degree angles, making them ideal for diagonal bracing.
BRC Clamp Scaffolding
Also known as Board Retaining Couplers, these secure scaffolding boards to prevent slippage from the scaffold. They help maintain the safety and stability of work platforms in windy or gusty conditions.
Ladder Coupler
Specifically designed to secure ladders to scaffolding tubes, preventing ladder slippage or detachment.
Loading Inspection and Certification
International safety standards, including as OSHA, EN, BS and ANSI , are met by our Steel Planks with Hook. Before delivery, we provide Strict quality and load-bearing inspections. All systems have access to certification and inspection reports, ensuring the safety of your business.

Customized Service
We support flexible customization sizes or brand according to customer's requirements, including frame size, tube thickness, surface finish, logo printing and accessory customization.

Stock Capacity and Delivery
Common sizes are kept in regular stock, so we can support low MOQ orders for customers demand, while customized orders are produced efficiently with stable lead times.

With over 10 years export experience, Irontrix supplies safe scaffoldingg systems for wholesale, rental, and construction projects all over the world. The production process covers steps from cutting, welding,punching, surface treatment, assembly, and final inspections, which ensure each product meets the international standards of quality. Drop forged clamps, Pressed Steel Couplers, Swivel Clamps, and Sleeve Couplers compliant with BS1139 standards. For reliable scaffolding products supply, we are your trusted partner in globe market.
FAQ
Q: What is the standard tube size for scaffolding couplers?
A: The most common tube outer diameter is 48.3mm (1.5" nominal), matching international standards BS1139 and EN74. Other available sizes include:
42mm, 42.7mm – Light-duty applications
48.6mm – Japanese/Korean markets
60mm, 60.3mm – Heavy-duty systems
76mm, 89mm – Specialized shoring applications
Q: What tests are performed on scaffolding couplers?
A: Standard test protocols:
Slip resistance test: Measures load before slippage (min. 6.25 kN for Class B)
Torque test: Verifies bolt tightening specifications
Failure load test: Destructive testing to ultimate capacity
Dimensional inspection: Ensures tube compatibility
Surface finish check: Coating thickness and adhesion
Thread inspection: Bolt and nut engagement quality
Q: What is the container loading capacity for couplers?
A: Approximate quantities per container:
20GP Container: ~20,000–25,000 pressed couplers OR ~15,000–18,000 forged couplers
40HC Container: ~40,000–50,000 pressed couplers OR ~30,000–35,000 forged couplers
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