Brass coupling, internal thread M10 x 1. This part has (on 2 sides) a side entrance. Handy when you want to let the cord of the lamp go sideways.
internal thread: M10x1
|Dimensions (cm):||internal: M10 x 1|
|Heigth (cm):||2.0 (0.8 inch)|
|Outer Diameter (cm):||1.2 (0.5 inch)|