Matt - thank you for answering the original question and the clarification – appreciate it.
It would be suggested that you do not assume…
Normally, I would do a search of this forum first…
Then, I might do some research on my own.
In any event, as indicated in the post I cited above…from 6 years ago states, it is a rivet.
If there are only 2 nails total, as you stated in posts 3 & 5, then it is a toe nail on the form.
The first two pictures in post 14 show only one nail.
When was this home built?
It looks like many of the homes built in the 80s most notably in Coral Springs…which used the “nail the straps depending on mood method”. 