Brass Wood Nipple for 10mm fixing lampholders [7045 PLU30531]
If you need to fix a lampholder onto wood try this Brass 10mm Wood Nipple. The idea is that the Brass Wood Nipple is screwed into the wood with just the 10mm fine thread sticking out. The lampholder is then screwed on and it will then sit flat on the wooden surface.
10mm fine thread to 3/8" (9.5mm) course thread.