Sea Dweller clasp pin question

[johnnyrako]

Hello, all

My clasp is a bit loose and the tiny little pin seems a bit worn so I am thinking it would help to replace it but not sure what it is called, size or where to buy.

Any help is greatly appreciated

I have been struggling with attaching pics so hopefully this works

[johnnyrako]

BTW the watch is not beat up but the lighting in the pic makes it look pretty rough

[johnnyrako]

Added better pic with different lighting