[quote=dmgbear55]I doubt those are necessary for a mast head casting. They are going to be very hard to pull with a standard riveter and require a steel mandrel rivet that is going to rust and stain. I think they may be more appropriate somewhere where the part is getting worked around very hard, like a Hobie frame member, rudders or something like that. They would also not help where the rivet hole is not completely round. Here is the link and info on these:
[url]http://www.murrays.com/19-5020.html[/url]
I think in the case of the mast head that taking care with some silicone application would be better. If you use these you need to coat the jacket with something to isolate the stainless from the aluminum mast.
dg[/quote]
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