BC 40mm Dia Threaded Lampholder [PLU34976]
The BC 40mm Dia Threaded Lampholder is use if you need to fit a 40mm diameter shade.
These are the same diameter as the ES lampholders but with a BC fitting.
Does not come with and shade rings so you will need 1 or 2 to hold the shade in place.
Use the E27 shade rings on this lampholder.
Comes with a 10mm base thread with a locking screw. The cap does NOT have an earth connection.