I saw on Wikipedia the following
> Split pins are frequently used to secure other fasteners, e.g. [clevis pins](https://en.wikipedia.org/wiki/Clevis_pin), as well as being used in combination with [hardboard](https://en.wikipedia.org/wiki/Hardboard) discs as a traditional joining technique for [teddy bears](https://en.wikipedia.org/wiki/Teddy_bear)
I don’t understand how such a small element would help secure other fasteners, say a nut for example. How does it secure it, I mean what value does it exactly add?
In: 3
If you look at [this Wikipedia image](https://en.m.wikipedia.org/wiki/File:Clevis.svg) you’ll see that the split pin is not load bearing. All it has to do is stop the main pin from slipping out (to the left in this case).
Most all split pins never have to bear a load, and rather, stop something from moving in a direction it shouldn’t. And when it doesn’t have to hold a load, it can be fairly small while still being extremely effective.
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