The individual truss elements are assembled by inserting the connectors and secured using the  safety pin.
• Product Type: Truss Accessories
• Type: Connector (Spigot)
• Material: Aluminium

Size
• 44mm Diameter x 105mm length
• Holes Diameter: 16mm x 14mm
• Holes to Holes Distance: 60mm

Spigot Connector
AW Professional SLTF011B