I have a 1973 Catalina 27. When I put up the sail last time going out, I realized the top rivets holding the boom to the gooseneck had sheared off. I think this may have happened when the boom dropped while putting the sail down before (it doesn't have a topping lift and I didn't hook it to the place it is held up before lowering). The bottom rivets have also clearly been stressed. I'm planning to replace all of them, but can't find any diagrams or manuals with what the size should be. Does anyone know what size/length these rivets are? I'm guessing 3/16 diameter (and can measure when back at the boat, but it will be hard to determine length. Would they be stainless steel for this location?
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