38mm Chrome Extender with Male & Female 10mm Threads PLU97461
If you have a male thread on your lamp base and need to raise a lampholder up, use this Chrome 38mm Extender which has a male 10mm thread one end and a 10mm female thread the other.
The Chrome Extender has a clearance hole all the way through for the cable.
Raising height 38mm with 5mm of male thread on top.