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01-15-2021, 12:59 PM
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#1
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Senior Member
City: Sequim Wa
Vessel Name: Michelle
Vessel Model: 1977 Schucker 436
Join Date: Apr 2019
Posts: 268
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Rubber Plug
Howdy, I removed a device from my exterior cabin ceiling which has left two .75” holes. I want to temporarily plug and seal the two holes as I may find a use for them.
I have been looking for a rubber/silicone/ plastic stopper that looks a bit like the hand drawn picture below.
I would like the shoulder on the plug to be about a 1/4 wide but if smaller no less than ..125”.
I know I’ve seen stuff like this but can’t seem find anything beyond tapers rubber plugs or very small plastic cap. Kind of like a champagne corks with a bigger top
Anybody?
Thanks
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01-15-2021, 01:13 PM
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#2
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Guru
City: gulf coast
Join Date: Jun 2014
Posts: 3,440
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You could ignore the hole size and use SS fender washers and round head bolt with an acorn nut
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01-15-2021, 01:18 PM
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#3
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Guru
Join Date: Jun 2008
Posts: 5,040
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__________________
Jay Leonard
Ex boats: 1983 40 Albin trunk cabin, 1978 Mainship 34 Model 1
New Port Richey, Fl
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01-15-2021, 01:31 PM
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#4
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Senior Member
City: Sequim Wa
Vessel Name: Michelle
Vessel Model: 1977 Schucker 436
Join Date: Apr 2019
Posts: 268
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Many ways to plug it. Just looking for something the least possible chance of water leakage. I will also be replacing the interior ceiling and two less bolts sticking through will be better.
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01-15-2021, 01:51 PM
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#5
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Guru
City: Miami Florida
Vessel Name: Possum
Vessel Model: Ellis 28
Join Date: Aug 2011
Posts: 5,308
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These make a water tight seal. I’d put a little sealant or locktite on the threads just to be sure.
https://www.mcmaster.com/well-nuts
__________________
Parks Masterson
Retired from Hopkins-Carter Marine Supply
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01-15-2021, 02:32 PM
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#6
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Guru
City: Pender Harbour, BC
Vessel Name: Gwaii Haanas
Vessel Model: Custom Aluminum 52
Join Date: Sep 2013
Posts: 3,791
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Bevel the hole and with a little sealant (I would use butyl) use a flat-head machine screw and an acorn nut below, or no nut at all. Then it will be flush. I had some aluminum fasteners for a project and they had a nice hex head. McMaster's, I think.
__________________
Don't believe everything that you think.
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01-25-2021, 12:45 PM
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#7
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Guru
City: San Diego, CA
Vessel Name: Second Chance
Vessel Model: 42' Uniflite Double Cabin
Join Date: Jul 2017
Posts: 828
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For a semi temporary measure I'd use a hole saw to cut a piece of starboard the proper diameter. Remember that the inside of your holesaw contains the part you want and you'll need a bigger hole saw than it is specified for, because the spec is on the outside diameter of the hole saw the piece inside is at least 1/4" smaller. After making my round plastic with the hole saw, some sand paper or a sanding pad in an angle grinder can clean up and taper the edges to make it more like the mushroom cap you are looking for.
Then use the center hole in that new round piece of plastic with a stainless steel cap head screw through the top to bolt it into place, bedding both the screw and the starboard with butyl tape. A nut and washer on the inside keep it secure.
If aesthetics matter on the inside, you can cut the stainless steel screw to just the right length and use an acorn nut for a nicer finish. Could also cut another round piece of starboard and shape it for the inside to use as a 'washer' if a decorative appearance matters.
Would make a watertight seal for a long time and yet be easily removeable and clean up with just some mineral spirits.
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01-25-2021, 12:51 PM
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#8
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Guru
City: Adelaide
Vessel Name: Kokanee
Vessel Model: Cuddles 30 Pilot House Motor Sailer
Join Date: Jul 2012
Posts: 3,218
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I would epoxy them up. Easy enough to drill them out if you ever find a use for them.
Temporary fixes often get forgotten about.
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01-25-2021, 01:56 PM
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#9
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Moderator Emeritus
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 21,191
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Quote:
Originally Posted by AusCan
I would epoxy them up. Easy enough to drill them out if you ever find a use for them.
Temporary fixes often get forgotten about.
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Absolutely. I would epoxy them closed with thickened epoxy. Those plugs are going to leak. And as said it is easy enough to drill the plugs out if you need to. 15 minutes and it will be done.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you aren’t one, there is no explanation possible.
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01-25-2021, 06:29 PM
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#10
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Senior Member
City: Sequim Wa
Vessel Name: Michelle
Vessel Model: 1977 Schucker 436
Join Date: Apr 2019
Posts: 268
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Thanks for all the good suggestions. I’ve got it sealed up for now until I decide what I want to do with holes. I may use them to mount some hardware in the future.
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