10mm female thread with 1mm pitch thread. the cable clearence is 6mm.
5 X Black Plastic Nylon Cable Cord Wire Grip for 10MM fine Thread Lamp Holders
ES E27 lamp holder 3 part plus 2 shade rings solid brass 10mm base thread
2 X PLASTIC NYLON CABLE CORD WIRE GRIP LAMP HOLDER 10MM THREAD WHITE
Cast brass hook 10mm female thread
Metal cord grip with male 10mm thread
2 pack LIGHT FITTING REDUCTION BUSH BRASS 10mm FEMALE to 1/2" MALE
