This will convert a lamp holder fitting from the standard 1/2" thread down to 10mm, i.e. M10 thread. Thread Reducer Adaptor.
Connection bush 10mm male to 10mm female
1/2" Male To 10mm Female Brass Lamp Holder M10 Thread Reducer Bush Adaptor
1/2" MALE TO 10MM FEMALE BRASS LAMP HOLDER REDUCER CONVERTER ADAPTOR
Reduction bush 10mm male to 8mm female
Reduction bush 10mm male to 1/2" female chrome plated
Reduction bush 10mm male to 4mm female
