Is this the correct hardware for pin style calipers?

All the pins were the same thread originally.

There are two different looking ones, but form fit and function the same.

70-71's originally have a smaller hex on them

1727477614832.png

72 up larger hex

1727477557051.png

I believe if you order a common parts store rock auto type kit you get the larger hex one. Those don't strip the on your socket head as easy.