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Old 03-19-2009
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Metric clevis pins

Anyone knows where I might be able to buy metric sized clevis pins? I am looking specifically for 10mm. Retail place would be preferred (custom is always an option but usually pricey).
If you know of any stores selling them online in Europe - that'd work too.
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Old 03-19-2009
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I just used google and this came up

Schaefer 98-14 Schaefer Clevis Pin, 3/8\"(10mm) Dia x 25/32\"(20mm) L Ships Store Torresen
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Old 03-19-2009
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Quote:
Originally Posted by Freesail99 View Post

Thats's the thing - these are not really metric. They are actually 3/8" which is quite close to 10mm but a little smaller. They will "work" but they do not provide as nice a fit as a real metric 10mm would. In particular for the forestay top fitting I'd really like to get a proper size to increase strength and avoid point loading.

I just tried a 3/8" and it is clear that it is smaller than 10mm - by a tiny amount but enough so that it is lose in the fitting and definitely loads just the center. 3/8" is 9.52mm.
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Quote:
Originally Posted by brak View Post
Thats's the thing - these are not really metric. They are actually 3/8" which is quite close to 10mm but a little smaller. They will "work" but they do not provide as nice a fit as a real metric 10mm would. In particular for the forestay top fitting I'd really like to get a proper size to increase strength and avoid point loading.

I just tried a 3/8" and it is clear that it is smaller than 10mm - by a tiny amount but enough so that it is lose in the fitting and definitely loads just the center. 3/8" is 9.52mm.
Unless you have a press fit pin (which you wouldn't want in a clevis), you are going to have "point loading".
The shear strength is the cross sectional area of the pin ( Pi X r X r ), doubled for a clevis pins two contact points.
Lessening the diameter of the pin to 3/8" reduces the effective shear strength by 10%. I was surprised that only .019" reduction in diameter reduced the strength by that much...especially since I ran the numbers thinking the change in size would result in less than 5% strength.

Good luck finding the pins you need - I would think they'd be easier to find
outside of the U.S.
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Check this site:

B&T Clevis Pins from Boneham and Turner
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DId you try McMaster Carr??
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Old 03-19-2009
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I just asked my rigging guy, here is his response; "If you locate metric clevis pins could you also pick up a left handed screwdriver for me?"
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Old 03-19-2009
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Quote:
Originally Posted by Wannafish View Post
Lessening the diameter of the pin to 3/8" reduces the effective shear strength by 10%. I was surprised that only .019" reduction in diameter reduced the strength by that much...especially since I ran the numbers thinking the change in size would result in less than 5% strength.
sounds reasonable. strength is a function of cross-section which is a square function of radius (or diameter), so 5% less diameter is 10% less crossection -> 10% less strength.

Quote:
Good luck finding the pins you need - I would think they'd be easier to find
outside of the U.S.
I think so too. I was hoping someone (perhaps a non-US member) would be able to point me to their local site.
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Old 03-19-2009
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Originally Posted by celenoglu View Post

Almost, but they make them out of 303 stainless which is not as corrosion resistant as "marine grades". Why oh why, this would have been perfect. But I do think the answer is out there. All those european boats need to get their rigging parts somewhere.
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Old 03-19-2009
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Quote:
Originally Posted by sailingdog View Post
DId you try McMaster Carr??
Yep. Looks like all imperial stuff.
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