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Scaffolding Couplers
Scaffolding Couplers & Clamps — BS1139 EN74 Drop Forged & Pressed Steel
Drop forged & pressed steel | Hot-dip galvanized | BS1139/EN74 Class B certified | Double, Swivel, Sleeve, Putlog, Girder | Factory-direct from Tianjin | MOQ 500 pcs
Scaffolding couplers (also called scaffold clamps or fittings) are the critical connectors in tube-and-coupler scaffolding systems. They join 48.3mm OD scaffolding tubes to create rigid, safe, and load-bearing connections. SINO EAST STEEL GROUP manufactures the complete range: double couplers (right-angle), swivel couplers, sleeve couplers (joint pins), putlog couplers, and girder clamps.
All couplers are manufactured to BS1139 and EN74 Class B standards with typical slip loads ≥9.0kN for drop forged and ≥6.1kN for pressed steel. Available in hot-dip galvanized, electro-galvanized, and painted finishes.
Coupler Types & Specifications
| Type | Connection | Weight (Drop Forged) | Slip Load (EN74) | Best Use |
|---|---|---|---|---|
| Double Coupler | 90° Right Angle | 1.05 kg | ≥9.0 kN (Class B) | Main frame joints, ledgers to standards |
| Swivel Coupler | 0–360° Any Angle | 1.15 kg | ≥9.0 kN (Class B) | Diagonal bracing, irregular connections |
| Sleeve Coupler | End-to-End (0°) | 0.75 kg | ≥6.0 kN | Tube extension, vertical/horizontal joining |
| Putlog Coupler | Tube-to-Blade | 0.65 kg | ≥6.1 kN | Board support, working platforms |
| Girder Clamp | Tube-to-Beam | 2.5 kg | ≥15.0 kN | Steel beam attachment, industrial |