If you've ever disassembled or even just resized a bracelet, you know how secure those pins are. They aren't really weak points and should not need to be replaced.
Furthermore, the bracelet and all hardware are stainless steel and should not corrode. However, it's still a good idea to rinse the watch thoroughly with freshwater after every exposure to saltwater. This will also prevent the bezel from getting gunked up over time.
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