I was thinking an aluminum rivet to fill the hole....

Wayne.B wrote in message
snip
If it was my boat I'd probably be inclined towards a cheap and dirty
approach such as drilling out the pinhole, tapping threads for a small
stainless machine screw, and securing with lockwasher, nut and a dab
of 3M 5200. Also put some 5200 on the machine screw before you thread
it in.