| Fitting Type | Primary Function | Ideal Application |
| Right Angle Coupler (Double) | Connects two scaffold tubes intersecting at a strict 90-degree angle. | Securing ledgers and standards for primary structural load bearing. |
| Swivel Coupler | Connects two tubes at any angle through a 360-degree rotation. | Installing diagonal bracing, bracing frameworks, and bracing ties. |
| Sleeve Coupler | Joins two scaffold tubes end-to-end coaxially. | Extending the height of standards or length of long ledger runs. |
| Putlog Coupler (Single) | Connects a putlog or transom tube to a ledger at 90 degrees. | Supporting scaffold boards or planks where a non-load-bearing joint is sufficient. |
| Board Retaining Clamp (BRC) | Secures scaffold planks firmly to the supporting transom. | Preventing wind uplift or accidental displacement of working platforms. |