ProX XT-CP-PAC3 Set of (4) Double Sided Conical Couplers with connectors and pins

This is the hardware that joins one ProX conical truss segment to the next: a set of four double-ended conical couplers, packed with eight connector pins and eight safety pins. One coupler per chord, four chords per square-truss joint - so one pack makes exactly one connection between two F34 segments, which is the number worth remembering when you are counting out a tower or a goal-post build.

The conical shape is what does the work. It pulls the two chord ends into line as the pins drive home, so the joint is tight and rigid at the stress point rather than merely bolted, and it assembles with a small brass or aluminium hammer instead of a spanner set. Keep spares in the case; connector and safety pins are the parts that vanish off a dark stage.