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bolt metal type in aluminum mast
I need to tap out a 1/4" hole in my mast to 5/16" 18 (no threads in there right now) and put a machine screw in there. I have some options in terms of metal types and there have been a number of discussions about corrosion and so on with SS in contact with aluminum and how really useless the isolating compounds are in a sal****er environment etc etc So what's the metal of choice? I'm seeing brass, SS, silicon bronze, zinc plated steel.. what's optimal for the aluminum (non-)interaction? These other discussions don't have a consistent conclusion. (And no rivets, this is a small job, I really do need the machine screw). This is a freshwater boat and has been for a long time. However I wouldn't rule it out of taking it down the east coast one day. Thanks for any comments, -CB |
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