[quote=tominpa]My trampoline was pulling free from the hull and standard blind pop rivets would not hold in the fiberglass. My solution was to drill out and replace with "exploding head, tri-fold rivets in a 5/16 length. These rivets have a mandrel that shears the body of the rivet and pulls it against the hull of the boat. This is a very strong attachment that distributes weight to a much larger area, almost like if you were able to put a washer on the back-side. The mandrel hole needs to be sealed. You may have to search for exactly what you want, but here is a typical link. [url]https://www.walmart.com/ip/Mill-3-16-Large-Head-Tri-Fold-Exploding-Aluminum-Mandrel-Pop-Rivets-25-pack/933821125[/url]
[img]https://i5.walmartimages.com/asr/b4ce3f81-7d1b-46f3-806b-6d00bbee93d2_1.0c875fcf885fc0d93945be82ff5f063e.jpeg?odnHeight=612&odnWidth=612&odnBg=FFFFFF[/img][/quote]
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