what is an uno thread
In this article we will explore the use of the UNO type fitter and the UNO fitter adapter. An UNO fitter is a large threaded ring in the middle of the fabric shades top tripod. It is designed to thread onto UNO sockets. UNO sockets have the same matching thread on their socket shell. The most common application for this type of shade and holder is the bridge arm floor lamp.