Proper bolt type for mast step? - SailNet Community

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Old 05-21-2013
cghubbell's Avatar
1977 CS27 ~ Ravat
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Proper bolt type for mast step?

I have a 1977 CS27 with a deck-stepped mast. Somehow over the winter, the bolt which attaches the aluminum mast base casting to the aluminum mast step has vanished, as such, I need to order a new one.

I see a number of varieties of bolts, and I'm wondering if there is any consensus on the best practice for bolt grade in this application.

18-8 Stainless vs. 316 stainless?
Grade 2,5,8?

It seems like this bolt will have very little load on it other than perhaps some shear loading, which I think any bolt will be sufficient to handle in the proper dimensions. I'm guessing 18-8 would be the best bet for its balance of strength and corrosion resistance. Does that sound right?

I think the biggest challenge is going to be finding a partially threaded bolt with the proper unthreaded portion to prevent grinding up the mast base.

Thank you,
CS27 #1254 ~ Ravat
PYC, Lake Ontario

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Old 05-21-2013
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Re: Proper bolt type for mast step?

I think any stainless bolt will work just fine. That is what I use on my Mirage. I coat it with a little grease once a year and never had problems with it.
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