Paul i support your idea and effort. Sounds like a good challenge to try.
Why i say this is the threads on the jar are the type i have noticed are common on lots of food jars like for example pickles.
If you crack the solution you have a method for everyone to be able to put a lid on these jars made of wood. That it may not have been done before makes it even more interesting to tackle.
Now what i have noticed on these common jars lids is that whilst it looks like a thread it kinda is a very very short thread if one looks at it from the point of view of how far it needs to turn.
The common metal versions seem to just have a rolled lip with what i can best describe as a notch. You will know when we put one of these on alignment is neccessary to get the lid to initially drop then only rotate i am gonna say no more than an inch if that of movement on the circumference.
So the wood version will need to mimic that action.
The concerns i see with such a shallow thread would be wood grain type and orientation. Any one applying too much rotational tightniing force would sheer the single wood thread.
This is a challenge to achieve. Where is Toni i would like to hear him chime in looks like a lot of the brains here surrenderd before they got started. Not like the guys i have come to know.
But i guess they better at picking battles they can win. I aint sure a tradditional screw type lid is the way to go. Best of luck with the teaser.
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