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GBurton 11-20-2007 01:03 PM

Bronze portlight install
 
Can someone tell me if or why I should use silcone bronze screws to throughbolt the portlights? Also, I want to use acorn nuts but cannot find any silicone bronze acorn nuts....should I use stainless nuts?

Thanks.....

AjariBonten 11-20-2007 01:07 PM

Have you tried Hamilton Marine for the acorn nuts?

I would be inclined to use a similar metal for the nut, even though it's not submerged.

I love Bronze.

sailingdog 11-20-2007 02:11 PM

GBurton-

I would use silicon bronze screws, but you could probably get away with using stainless steel acorn nuts on the interior, especially if you use TefGel or LanOcote to prevent galvanic corrosion issues. The interior should be dry... so the real dangers of galvanic corrosion are minimal—unless you've done a really lousy job of installing the ports. :D

JohnRPollard 11-20-2007 02:14 PM

Quote:

Originally Posted by GBurton (Post 225691)
Can someone tell me if or why I should use silcone bronze screws to throughbolt the portlights? Also, I want to use acorn nuts but cannot find any silicone bronze acorn nuts....should I use stainless nuts?

Thanks.....

GBurton,

What are the portlights frames made of? Aluminum, stainless, plastic, bronze, chromed bronze?

If bronze, I would stick with all silicone bronze hardware (nuts and bolts). If chromed-bronze, all stainless hardware would probably look better. There must be a source for s/b acorn nuts since we have them on our boat and I've often seen them on others. Hamilton MArine might have them, but my first look would be at Jamestown Distributors.

Edit: As for the interior of the portlights being dry, in theory yes. However, if you are installing solid bronze, through-bolted portlights, be aware that the interiors will "sweat" when there is enough interior/exterior temperature gradient. These portlights conduct both heat and cold, so in the winter will feel quite cold to the touch, leading humidity (from our breath and/or the propane stove) to condense on their surface.

sailingdog 11-20-2007 03:49 PM

Good point JRP... :D forgot about the condensation issues...

GBurton 11-20-2007 10:10 PM

Cheers John -
They are bronze. I have tried mightily to get bronze acorn nuts but cannot find them.

Quote:

Originally Posted by JohnRPollard (Post 225738)
GBurton,

What are the portlights frames made of? Aluminum, stainless, plastic, bronze, chromed bronze?

If bronze, I would stick with all silicone bronze hardware (nuts and bolts). If chromed-bronze, all stainless hardware would probably look better. There must be a source for s/b acorn nuts since we have them on our boat and I've often seen them on others. Hamilton MArine might have them, but my first look would be at Jamestown Distributors.

Edit: As for the interior of the portlights being dry, in theory yes. However, if you are installing solid bronze, through-bolted portlights, be aware that the interiors will "sweat" when there is enough interior/exterior temperature gradient. These portlights conduct both heat and cold, so in the winter will feel quite cold to the touch, leading humidity (from our breath and/or the propane stove) to condense on their surface.


Rockter 11-21-2007 06:15 AM

Yes, bronze, bronze and more bronze.

JohnRPollard 11-21-2007 03:13 PM

Here are some in brass, which might be okay:

http://www.jamestowndistributors.com...%28Cap%29+Nuts

You might also check with Rostand in Utah at 801-280-2400.

Or MArine Fastener Wharehouse at http://store01.prostores.com/servlet...use/StoreFront

Or CCFasteners.com

I will try to think of others. But in the interim you could just use standard s/b hex nuts until you come across the acorns. I'm sure you have plenty of other projects....

Sapperwhite 11-22-2007 01:11 PM

Quote:

Originally Posted by JohnRPollard (Post 225738)
As for the interior of the portlights being dry, in theory yes. However, if you are installing solid bronze, through-bolted portlights, be aware that the interiors will "sweat" when there is enough interior/exterior temperature gradient. These portlights conduct both heat and cold, so in the winter will feel quite cold to the touch, leading humidity (from our breath and/or the propane stove) to condense on their surface.

I have 10 bronze ports and they sweat like crazy in the winter when its nice and toasty down below and frigid outside. Sometimes they sweat so much they drip.


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