I have a hanging light fixture that I'm trying to put a lampshade on. Because the light fixture hangs from the ceiling, If I don't screw something underneath it, the lampshade would fall down.
The light fixture has screw threads, so I can use a screw ring to hold the lampshade up. But, I don't know the name for the screw-ring so I don't know how to shop for it.
I see in this photo of the light fixture next to a screw-ring-thing that is too small, what is the British name for the screw-ring?