lamp fitting

This it a "bolt" to cover the thread for a E27 fitting outside (M40*2.5 thread). works great with Ikea light bulbs.
To change the model all you have to do is change the parameters of the Fusion 360 model to you measurements.
Outer diameter of the base and top (make those equiel if you want cylindrical). And the height/length of the fitting (to the lamp). You can change the inner diameter as well, however be careful that the thread does not change!

The 2nd photo shows one lamp with and one w