Heavy duty double bolt Malleable iron cast steel metal hose clamp

Product Specification

Our EN74 / BS1139 compliant Steel Galvanized Swivel Coupler Clamps are engineered scaffolding components designed to securely connect scaffold tubes at any angle. Available in drop-forged, pressed steel, and cast iron variants, these couplers provide reliable, high-strength connections essential for construction, industrial maintenance, and temporary structural applications .

Manufactured from Q235 grade steel with a protective hot-dip galvanized or electro-galvanized surface finish, these couplers deliver exceptional corrosion resistance and structural integrity even in demanding outdoor and coastal environments. Compliance with EN74-1 and BS1139 standards ensures they meet rigorous international safety and quality benchmarks for scaffolding fittings .

Key Features & Benefits

• Three Manufacturing Options: Choose between drop-forged couplers for maximum strength and heavy-duty applications (Class B), pressed steel couplers for a cost-effective balance of performance and economy, or cast iron variants for general-purpose use .

• BS1139 & EN74-1 Certified: Fully compliant with British and European scaffolding standards, ensuring safety and regulatory acceptance on professional construction sites .

• Versatile Swivel Design: Allows connection of scaffold tubes at any angle (360° rotation), providing flexibility for complex scaffolding configurations, bracing, and diagonal supports .

• Superior Corrosion Protection: Hot-dip galvanized or electro-zinc plated surface treatment delivers long service life, even in high-humidity or salt-exposed environments .

• High-Strength Material: Constructed from Q235 steel with Grade 8.8 T-bolts and nuts (1/2" × 82mm), ensuring reliable load-bearing capacity and slip resistance .

• Anti-Slip Design: Ribbed internal surfaces provide enhanced grip and prevent tube slippage under load .

• Secure Fastening: Equipped with captive nuts (AF 21mm–23mm) to prevent loss during assembly and disassembly, compatible with standard spanners .

Technical Specifications

Manufacturing Process Comparison

Dimensional & Weight Reference Table

Custom diameters, bolt lengths, and surface finishes available upon request.

Typical Applications

• High-rise building internal and external grid scaffolding 

• Bridge, viaduct, and tunnel formwork support systems 

• Industrial plant maintenance and inspection platforms

• Oil & gas industry onshore and offshore scaffolding (compliant with Aramco, KNPC, KOC, Sinopec, etc.) 

• Temporary grandstands, stages, and event structures 

• Offshore and coastal construction projects requiring premium corrosion resistance

Quality Assurance & Compliance

All our swivel coupler clamps undergo rigorous roundness testing and slip/load safety testing in accordance with EN74-1 Class B requirements . Products are backed by ISO 9001 quality management systems and, where applicable, CE and SGS certifications . Consistent production processes ensure reliable torque performance, bolt security, and dimensional accuracy.

Why Choose Our Couplers?

• Proven Compliance: Full adherence to BS1139 and EN74-1 standards—trusted by scaffolding contractors worldwide .

• Flexible Manufacturing: Forged, pressed, and cast iron options allow you to match strength requirements with budget constraints .

• Regional Standard Availability: British, American, German, Japanese, and Korean types available .

• Global Shipping & Support: Reliable supply chain with responsive technical assistance for project-specific customization .

• Cost-Effective Durability: Long service life reduces replacement frequency and total cost of ownership.