Scaffold couplers & clamps
Scaffold couplers and clamps, sourced from the Cangzhou forging and casting cluster.
Sourcing and export supply for scaffolding contractors, distributors and importers. Prepare your specification with the technical guides and send an enquiry: we select a factory in the cluster, check its documents, and quote you ourselves. Read how ordering works before requesting samples or a quotation.
Quick reference
- Tube OD
- 48.3 mm (BS EN 39 / EN 74)
- Coupler classes
- EN 74-1 Class A/AA · Class B/BB
- Legacy UK standard
- BS 1139-2.2 (drop forged)
- Right-angle type-test slip
- Class A 10,0 kN · Class B 15,0 kN
- Finishes
- Hot-dip galvanised · electro-plated · painted
- Manufacture
- Drop forged · pressed steel · malleable cast
Load figures are type-test characteristic values from BS EN 74-1:2022+A1:2025 Table 8, not safe working loads. How to read them.
Couplers we supply
Full range →Drop-forged couplers from a forging factory in Renqiu, Cangzhou. Photos supplied by the factory; price, MOQ and lead time are quoted for each enquiry.
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.
Guides
All guides →- Coupler Types Guide hub
Scaffolding Coupler Types and Names: Chart of UK and US Names, Uses and EN 74 Classes
Scaffolding coupler types by name: double, swivel, parallel, sleeve, joint pin, putlog and beam clamp, with UK and US names, uses and EN 74-1 classes.
- Tube & Fitting Systems
Tube and Fitting Scaffolding (Tube and Clamp): Parts List, Names and How It Connects
Tube and fitting, tube and coupler, tube and clamp: one system of loose tubes and couplers. Parts list, names by market and which coupler goes where.
- Standards & Load Ratings
Class A vs Class B Couplers under BS EN 74-1:2022+A1:2025: What the Class Means and How to Prove It
What Class A and Class B mean for each coupler type in BS EN 74-1:2022+A1:2025, who sets the class, and which documents support it beyond a stamped mark.
- Standards & Load Ratings
BS 1139 vs EN 74: How the Scaffold Coupler Standards Relate and What to Specify
How BS 1139 and EN 74 relate, from BS 1139-2.1:1991 to BS EN 74-1:2022+A1:2025, what changed in the coupler tables, and what to write on an order.
- Coupler Types
Scaffold Beam Clamp (Girder Coupler): What EN 74-1 Covers and What to Ask
What a scaffold beam clamp or girder coupler is, why BS EN 74-1:2022+A1:2025 has no load table for it, and what to ask a supplier before ordering.
- Coupler Types
Sleeve Coupler vs Joint Pin (Spigot): Which Standard Covers Which
How a sleeve coupler and a joint pin differ, what BS EN 74-1:2022+A1:2025 requires of the sleeve coupler, and which document covers the spigot pin.
How this site works
1 · Prepare the enquiry
Identify the coupler, standard edition, applicable type and class, quantity and destination. Add the documents and inspection arrangements you need so the open questions are visible from the start.
2 · We check and quote
We reply within two working days with any missing specification details and the next step. Before we quote, we check the selected factory's type-test report for the item and its export record. Factory relationships are still being built, so price, MOQ and lead time are quoted for each enquiry; there is no price list.
3 · You contract with us
We quote, sign the contract and arrange production and shipment; we do not manufacture. The export side of the business is being set up, so the contracting party and payment route for each order are confirmed in writing on the PI or contract before you pay. See how to order and the site terms.