Twist lock coupling spigot

A scaffold coupling system comprising a coupling spigot connecting upper and lower tubular scaffold legs the coupling spigot assembly comprising a spigot having opposing ends, each end sized for insertion within a respective one of the upper and lower scaffold legs, a stop collar projecting outwardly from and secured to said spigot forming stop faces for abutting with an end of each of said upper and lower scaffold legs respectively, an upwardly opening locking collar secured to and positioned outwardly of said spigot and receiving the end of said upper scaffold leg between said locking collar and said spigot;

• said locking collar including a first receiving slot exterior to said spigot receiving a locking projection extending outwardly from and provided on said upper scaffold leg allowing said upper scaffold leg to engage and be supported by one of the faces of said stop collar and a first locking slot associated with said first receiving slot positioned to allow rotation of said upper scaffold leg about a longitudinal axis thereof when supported by said stop collar to restrain said locking projection in said first locking slot preventing axial separation of said upper scaffold leg without removal of said locking projection from said first locking slot.