|Outer Diameter (cm):||1.6 (0.63 inch)|
|Diameter of opening (cm):||0.4 (0.16 inch) M4x1|
Cover Sphere (Ball Shape), brass, 16 millimeter / 0.06 inch diameter.
Internal thread: M4x1 or 4mm (0.16 inch and pitch 1)
Sometimes you have to cover a hole or repair an upright piece of wire end when repairing an old lamp. Then these spheres are very useful.
And sometimes lamps are provided with these kinds of spheres and you just miss one.
If you wish, you can polish the cap ball until it shines splendidly with a little copper polish.