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Old 06-04-2014, 09:13   #1
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Monel screw

Any one know of a good source for monel screws? The longest 1/4" monel pop rivet I could find is 3/4" long, and that is too short. I am putting aluminum based rope clutches on my aluminum mast. The base of the clutch is nearly 1/2" thick.
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Old 06-04-2014, 09:28   #2
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Re: Monel screw

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Originally Posted by xeon_tsd View Post
Any one know of a good source for monel screws? The longest 1/4" monel pop rivet I could find is 3/4" long, and that is too short. I am putting aluminum based rope clutches on my aluminum mast. The base of the clutch is nearly 1/2" thick.
I used stainless steel machine screws and Permatex Blue thread locker to keep them tight and prevent electrolysis.

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Old 06-04-2014, 10:00   #3
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Re: Monel screw

SS screws should be OK for this. If you want any other specialty fasteners look here.

McMaster-Carr
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Old 06-04-2014, 10:01   #4
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Re: Monel screw

Google will give you a lot of choices, including Amazon.
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Old 06-04-2014, 13:29   #5
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Re: Monel screw

Everybody uses drilled and tapped SS machine screws to attach stuff to aluminum masts and has been doing so since since they became de riguer in tha last millennium. Why fight success. That's how they were done on my 43 year old mast and they worked just fine without any electrolysis problems. Do use TefGel, LocTite, Lanolin on the threads to make it easier to remove them should the need arise.
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Old 06-04-2014, 15:48   #6
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Re: Monel screw

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Everybody uses drilled and tapped SS machine screws to attach stuff to aluminum masts and has been doing so since since they became de riguer in tha last millennium. Why fight success. That's how they were done on my 43 year old mast and they worked just fine without any electrolysis problems. Do use TefGel, LocTite, Lanolin on the threads to make it easier to remove them should the need arise.

Yes and all good riggers use a zinc chromate barrier , like duralac or equivalent when they use SS on aluminium

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Old 06-04-2014, 16:07   #7
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Re: Monel screw

Duralac is barium chromate, not zinc chromate, but the protection mechanism is the same.

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Old 06-04-2014, 16:10   #8
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Re: Monel screw

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Duralac is barium chromate, not zinc chromate, but the protection mechanism is the same.

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