Pop rivets have a tiny hole in the center, where the mandrel is located... not water tight. Also, do you want your boat to look like a junkyard reject... and it adds windage and weight aloft.
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Sailingdog Telstar 28
New England
You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.
—Cpt. Mal Reynolds, Serenity (edited)
If you're new to the Sailnet Forums... please read this POST.
IMO, anything that going to take a stress would be drilled, tapped and screwed and there really should be that many items, everything else could be rivited with aluma, alou min, a-lou - me, ah f**k it, not stainless
In many cases, rivets are actually stronger than the screws would be, when connecting hardware to a mast. Most of the times the only threaded surface bearing the loads for a machine screw that is attached to a spar are the four-or-five courses of threads in the wall of the spar itself...which isn't all that thick. A rivet is held in place by the peened over section that the mandrel mushrooms out... and that, plus the fact that the diameter of the end of the rivet is larger than the hole generally give it a good deal of support. The main reason to use screws over rivets when adding hardware to a spar is if the hardware needs to be easily removed for servicing or replacement.
For instance, I used 3/16" stainless steel rivets to attach several small padeyes to the spreaders on my boat.... I don't see any need to remove them or repair them...there's really nothing on a padeye to break or service. For the line clutches and winches, I used screws. However, I would bet that the two SS 3/16" rivets would support as much weight as the five or six screws used to hold the winch to the mast.
__________________
Sailingdog Telstar 28
New England
You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.
—Cpt. Mal Reynolds, Serenity (edited)
If you're new to the Sailnet Forums... please read this POST.
Ok, I'm knee deep in this project now, things going ok. One question:
The previous owner apparently liked stainless steel 'sheet metal' self tapping screws. They seem pretty good actually, I've removed a bunch of them to exchange out some sheeves and I think I'm gonna go this route for the main mast shaft instead of rivits unless it's something I'm not gonna move ever. btw, the old rivets were aluminum, so I'm guessing that would be ok to use for most of my stuff too. The aluminum rivets drill out so easy I'm temped to use them for everything to cut down on galvanic corrosion....
The mast head is pretty thick aluminum, so anything I got to put on there (antenna) I'm gonna drill, tap, and use ss screws. btw, I saw this on another forum, anyone ever use
I'm not a big fan of self-tapping screws, especially for use in aluminum spars, since the threads aren't as strongly formed as those made with a proper tap, and the material is relatively thin to start with...so each thread has much more affect on the grip of the fastener.
The Rivet Nuts look like a pretty good solution. It looks like the stainless steel ones are custom order and may have a fairly high minimum number to order. I am curious as to how much the tools and fasteners cost.
__________________
Sailingdog Telstar 28
New England
You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.
—Cpt. Mal Reynolds, Serenity (edited)
If you're new to the Sailnet Forums... please read this POST.
Ok, I'm knee deep in this project now, things going ok. One question:
The previous owner apparently liked stainless steel 'sheet metal' self tapping screws. They seem pretty good actually, I've removed a bunch of them to exchange out some sheeves and I think I'm gonna go this route for the main mast shaft instead of rivits unless it's something I'm not gonna move ever. btw, the old rivets were aluminum, so I'm guessing that would be ok to use for most of my stuff too. The aluminum rivets drill out so easy I'm temped to use them for everything to cut down on galvanic corrosion....
The mast head is pretty thick aluminum, so anything I got to put on there (antenna) I'm gonna drill, tap, and use ss screws. btw, I saw this on another forum, anyone ever use
there is something similar sold under brand name RivNut
This looks good. But do need a surveyor or N.A. report on them. Or someone who has field tested them on their own boat.
The mast manufacturer's feelings about them?? Some one!?
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