this post was submitted on 13 Oct 2024
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The world has a lot of different standards for a lot of things, but I have never heard of a place with the default screw thread direction being opposite.

So does each language have a fun mnemonic?

Photo credit: https://3.bp.blogspot.com/-Giy8OrYJTjw/Tfm9Ne5o5hI/AAAAAAAAAB4/c7uBLwjkl9c/s1600/scan0002.jpg

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[โ€“] kambusha 80 points 1 month ago* (last edited 1 month ago) (11 children)

I never really got that one, because "left" vs "right" only works when you are looking at the top of the screw. At the bottom, left tightens, and right loosens. So the one I remember is "clockwise to close".

Edit: the image on the post is actually a good example. If I'm off the screen to the right holding the spanner, then from my perspective, "left" would tighten.

[โ€“] Peppycito -1 points 1 month ago (5 children)

If you mime tightening a bolt, your thumb moves to the right. And vise versa.

[โ€“] kambusha 3 points 1 month ago (1 children)
[โ€“] Peppycito -2 points 1 month ago (1 children)

Both. Odd that you would ask without trying it yourself.

[โ€“] kambusha 1 points 1 month ago

With my left hand, my thumb starts facing right, and then sort of goes down and towards the left.

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