Best Bang For The Buck Fasteners

Discussion in 'Boatbuilding' started by Boston, Apr 7, 2010.

  1. Boston

    Boston Previous Member

    so lets suppose Im working on a motor cruiser with a double diagonal hull, Im thinking I'll be plastic nailing my first layers into place and scewing that last one to my stringers

    whats my best fastener for the buck

    I could go all out and use silicone bronze
    I could get cheap and use galvanized
    what are my best options and whats the cost pr K

    any thoughts on durability/cost
     
  2. Lurvio
    Joined: Jul 2009
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    Lurvio Mad scientist

    I haven't build a boat yet, but otherwise have experience. I don't see a reason why good quality galvanized screws wouldn't last, under fiberglassing at least, they just have to stay dry.

    Here in Finland I think Stainless screws are a lot cheaper than bronze, don't know if thats the case elsewhere. I've used stainless screws with pressure treated wood, because zinc won't last with the copper- and chromesalts used in the wood.

    The small boat I'll build in the near future will have basic electrocoated screws.
     
  3. Stumble
    Joined: Oct 2008
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    Stumble Senior Member

    I don't know that it really matters, but I would be concerned with about galvinized screws since the zinc might act like a sacrificial anode if you ever wound up in a hot harbor. But I am sure some of the others might have a better understanding.
     
  4. hoytedow
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    hoytedow Wood Butcher

    Stay away from galvanized screws. They are fine for a barn wall, but moisture gets everywhere. When the zinc is gone the rusting steel screw will swell up like Mr. Big in a Bond movie. Silicone bronze are the best and stainless steel come in second for salt water resistance.
     
  5. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    Lloyd's would give 15 year rating to galvanized. That means they need a survey or automatically downgrade after. Stainless is worse because of crevice corrosioin. Silicon bronze is the best.
     
  6. TollyWally
    Joined: Mar 2005
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    TollyWally Senior Member

    Gonzo,
    What is the Lloyds rating for stainless?
     
  7. gonzo
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    gonzo Senior Member

    Zero bellow the waterline. It should never be submerged.
     
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  8. hoytedow
    Joined: Sep 2009
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    hoytedow Wood Butcher

    My ignorance is exposed, but at least I was right about the silicone bronze. Thanks.
     
  9. TollyWally
    Joined: Mar 2005
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    TollyWally Senior Member

    Just noticed your sig line. LOL, you're not supposed to tug on superman's cape either! Apologies to Jim Croce
     
  10. hoytedow
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    hoytedow Wood Butcher

    :cool: :cool: :cool: :p
     
  11. oldsailor7
    Joined: May 2008
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    oldsailor7 Senior Member

    I have built a number of boats from 25' to 52' using silicon bronze, epoxy coated staples in various lengths up to 2 3/8" long using a power stapler.
    The new gas powered hand portable staplers are the best and quickest.
    Of course all the joins should be made using Epoxy Glue. The staples are the secondary fastners and are much better than screws IMO.
     
  12. hoytedow
    Joined: Sep 2009
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    hoytedow Wood Butcher

    Sorry about spelling silicone bronze. I know it should be spelled silicon bronze, but for 19 years I worked at a surgery center where we installed silicone breast implants.:p :p
     
  13. Boston

    Boston Previous Member

    sounds like a fun job

    excuse me sir
    could you please hold these breasticles for
     
  14. hoytedow
    Joined: Sep 2009
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    hoytedow Wood Butcher

    We also installed saline breast implants. If you put your ear close you could hear the ocean.:D :D
     

  15. Submarine Tom

    Submarine Tom Previous Member

    Wrong saline my friend.

    0.9% vs 3.9% but I like the puting your ear to them idea.

    -Tom
     
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