It's not reducers I need (have found them), simply the actual hollow screw to bolt the thing to the base - i.e. something with a flange on one end so it can be clamped up inside the base.
Hole is about 1/2 inch, so no adjustment of size needed.
Jim
I have a broken table lamp, where the lamp holder has been snapped off the base.
Looking for a replacement lamp holder with the screw attachment at the bottom, so I can re-mount it on top of the base.
Can find hundreds of lamp-holders with varying sizes of thread in the base (1/2 inch is...