It’s a rivet, and it can be drilled out, but replacing it with an equivalent joint is going to be difficult. if you don’t use the same material. This looks like a beach chair or some kind of outdoor thing. You might be okay replacing it with something like this: https://www.amazon.com/YORANYO-Assorted-M5-Decorate-Bookbinding/dp/B0B7WMQM97
You may be able to go to a local hardware store and find similar, but in lower quantity and maybe something not as specified for leathercraft/book binding. If you do go that route, put some loctite in the thread so you don’t unscrew yourself accidentally and lose one or more.
It’s a rivet, and it can be drilled out, but replacing it with an equivalent joint is going to be difficult. if you don’t use the same material. This looks like a beach chair or some kind of outdoor thing. You might be okay replacing it with something like this: https://www.amazon.com/YORANYO-Assorted-M5-Decorate-Bookbinding/dp/B0B7WMQM97
You may be able to go to a local hardware store and find similar, but in lower quantity and maybe something not as specified for leathercraft/book binding. If you do go that route, put some loctite in the thread so you don’t unscrew yourself accidentally and lose one or more.