A Calibrated Pull Test Tool

[Floradawg]

Rick, I had learned in technical school that fine threads are stronger than coarse. I would assume (there I go again) that would be with everything else being equal.

[Frank S]

Rick you have to understand how AI functions. all AI is, is a glorified search engine. with information sources from every piece of accumulated data imaginable. It then compiles this information regardless if the data had been submitted by metallurgical engineers who have conducted testing, or from works of fiction. Also, we have to remember that AI is still in its infancy.
I often approach things in a different manner. A 1/4" grade 2 bolt according to several load charts has a theoretical breaking point of around 2000 lbf if the root diameter of the thread is reduced by half the load would be in theory 1/4 the original since there is 1 fourth the sectional area remaining which seems to be about what you came up with. Nut thicknesses for bolts run on average about 80% of the diameter of bolts respective to size and grade to yield the same holding strength as the bolts.
Bronze depending on the alloy can range from 25,000 PSi yield to 40,000 PSI yield So if a grade 2 bolt is 50,000 PSi (I personally believe they are lower than that) this would put the lower grade of bronze at half the strength. If the thread engagement is 1/4" the pull out should be around 800 lbs at a 2FOS
An online calculator somewhat bares out my line of thinking
https://a2zcalculators.com/science-a...oogle_vignette

But if memory serves from another of your threads you will not be relying on a single eye bolt