This is a nice item to help you to electrify your oil lamp with out harming the lamp, a threaded brass convertor for a #2 size collar.
Measures 1&3/8 inches wide and the threads are 1&3/16 inches wide in diameter.
The threaded nipple, your socket will screw onto that.
Screw into your collar and screw on your wired socket and you have an oil lamp converted to electric with no damage to the lamp.
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