Expansion joint pin for connecting two vertical standards end to end inside the tube.
The joint pin (expansion pin) is dropped into the top of a lower standard and expands inside the tube to lock the upper standard in line. It is the fastest way to extend vertical standards — no bolts to tighten — which is why rental fleets and erectors keep them in bulk.
A slotted lower section opens inside the tube and locks the pin against the bore for a rattle-free vertical joint.
The forged collar sits on the top of the lower standard and centres the upper tube automatically.
Pins are fitted by hand, dramatically reducing erection time on tall scaffolds.
Turned from solid carbon steel bar so there is no weld to fail in service.
Electro-zinc as standard, hot-dip galvanizing available for coastal or long-life sites.
Dimensions follow EN 74 / BS 1139 series. Custom sizes produced to drawing.
| Process | Drop-forged or pressed sheet steel (two versions available) |
|---|---|
| Product Type | Expansion joint pin / connecting pin |
| Manufacturing Process | Machined from solid carbon steel bar, expansion slot cut |
| Material | 45# carbon steel |
| Compatible Tube | Internal fit for 48.3 × 3.2 mm standard (also 42.4 mm on request) |
| Pin Diameter | Φ38 mm body, Φ48 mm collar |
| Surface Finish | Electro-zinc plated / hot-dip galvanized 45–70 μm |
| Unit Weight | Approx. 0.35 kg |
| Standard Reference | EN 74 / BS 1139 compatible |
500 pcs
100 pcs per carton, or 200 pcs per woven bag, on steel pallets
15–25 days after deposit and sample approval
Download full specification sheet (PDF) · Includes dimensions, materials, coating options and packing data.
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