I have a standard British ceiling pendant room light in my hallway. I also have a glass lampshade (which is roughly a truncated cone in shape). I'd like to fit the lampshade on the pendant.
The part of the pendant fitting that holds the bulb has two pieces of plastic which screw together, which seem to be designed to sandwich a lampshade between the two pieces, holding the shade up. However, the screw threads are quite short, and my glass lampshade has a wall thickness which is too thick to allow the inner and outer screw threads to meet -- see sketch (sorry for my bad drawing):
Looking online I only see complete pendants plus shades (including the shade, the plastic fittings I describe above, the length of pendant wire to the ceiling, and the fitting for the ceiling). That would require both spending more on a shade I like less, and also unnecessary messing with wiring that's working fine. I don't see any replacements or adapters for just the part of the fitting that holds the bulb, nor even any full pendant fittings that specify measurements for lampshades they can accept.
The lampshade is small and less than 300 grams (10 oz) in weight.
What's the easiest way to fit the shade?