In scaffolding, a joint pin or spigot, is an internal connection used for joining two metal tubes together, end to end. Joint pins are fitted with a screw by which the device can be expanded to grip the inside of the tubes firmly. Found on http://www.probertencyclopaedia.com/browse/TJ.HTM
In scaffolding, a joint pin or spigot, is an internal connection used for joining two metal tubes together, end to end. Joint pins are fitted with a screw by which the device can be expanded to grip the inside of the tubes firmly.