On Sun, 17 Feb 2019 23:03:48 -0000, wrote:

On 2/17/19 5:38 PM, Commander Kinsey wrote:
In the 21st century, has someone not invented a screw thread which
always aligns perfectly? Even a simple bottle top never goes on
straight, you have to turn the bloody thing backwards to make it jump
into place.

Methinks what you are looking for is called a "cork".

BTW, we teach our children the "turn it backwards" maneuver.

I only heard of it once, from my father when I was attempting to attach a lenshood onto a FED 4 35mm film camera, which has a very very fine thread.

BTW, it's manoeuvre.