Scaffold couplers & clamps
The buyer's reference for scaffold couplers: types, standards, load ratings and sourcing.
Plain-language guides for scaffolding contractors, distributors and importers. Every load figure is traced to BS 1139 / EN 74 or a named test report, and every guide ends with a route to a certified factory quote.
Quick reference
- Tube OD
- 48.3 mm (BS EN 39 / EN 74)
- Coupler classes
- EN 74-1 Class A · Class B
- Legacy UK standard
- BS 1139-2.2 (drop forged)
- Right-angle slip load
- Class A ≥ 10 kN · Class B ≥ 15 kN
- Finishes
- Hot-dip galvanised · electro-plated · painted
- Manufacture
- Drop forged · pressed steel · malleable cast
Browse by topic
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Coupler Types
Swivel, double / right-angle, sleeve, putlog, beam clamps and accessory couplers — what each does and where it is used.
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Standards & Load Ratings
BS 1139, EN 74 classes A/B, slip and failure loads, weights and dimensions, pressed vs drop-forged.
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Tube & Fitting Systems
How tube-and-clamp (US) / tube-and-fitting (UK) scaffolding goes together, and the names buyers use in each market.
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Sourcing & Pricing
Price ranges per piece and per tonne, certification checklists, galvanising options, MOQ and packing.
Guides
All guides →The first guides — coupler types, tube-and-fitting basics, swivel and double couplers, sleeve couplers vs joint pins, beam clamps — are being prepared.
How this site works
1 · Reference first
Types, standards and load tables are written for people who specify and buy couplers, not for search engines. Figures cite the standard or test report they come from.
2 · One enquiry, vetted factories
Send one specification. We forward it to forging and casting factories that hold EN 74 type-test reports, and return an FOB range, MOQ and lead time.
3 · No middleman markup
You contract directly with the factory. The site is paid a referral fee by the factory on completed orders, never added to your price. See how we work.