If you need to have the cable coming out the side of the lampholder, this is the connector to do that. This Side Entry Connector With Cord Grip allows you to screw it to a 10mm male thread on the lamp base and add a 10mm screw entry lampholder to the top. The flex or cable will then come out the side just under the lampholder. This is the only way now to have a Lampholder With Side Entry cable point.
Male / Female threads are 10mm and the height is 25mm including the male thread.
Outside diameter is 14mm
Made of solid Brass, sold as singles.