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Roof rack grommets 200

posted by  pdunn on  Sat Jun 18 19:20 CST 2022
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My car had a factory/dealer installed roof rack and when I bought it and started restoring it the rack was off the car with duct tape over the holes. I am trying to put it back on and the old grommets, with the nuts inserted, are useless, the lower rubber is more than half gone on most of them.

What are these things called--grommet with a nut in it--and is there a reasonable substitute out there? I haven't checked but I'm pretty certain they are NLA from Volvo.

BTW, I'm not looking for the roof hole plugs but the fasteners to reinstall the rack.

I thought of using nutsert rivets and sealing it with a butt load of caulk, I suppose that would be the last resort.








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    Roof rack grommets 200

    posted by  pdunn on  Mon Jun 20 11:25 CST 2022
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    Thanks to everyone who replied. I searched the archive and must have just missed the thread that was posted.

    I have a fastener warehouse locally here and I think the well nuts--now I know what they are called--are the solution. I had thought about jack nuts and nutsert rivets but those wouldn't give the seal to keep moisture out. Regardless I'll be caulking all the rubber seats to make sure.

    When I saw what originally went in I was a little surprised because Volvo over-engineered just about everything on these cars and those grommets that came off are clearly not meant to last the lifetime of a car as durable as a 240.








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      Roof rack grommets 200

      posted by  porkface on  Sun Aug 7 11:08 CST 2022
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      last visit: Fri Oct 24 09:12 CST 2014
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      the brand is wellnuts and they, with the racks, were sourced in the u.s., not sweden. always dealer installed. the size is 1/4 28 us. forget what drill size but you have holes.








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      Roof rack grommets . ...sealant 200

      posted by  Nahtanha on  Tue Jun 21 10:22 CST 2022
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      last visit: Tue May 20 10:10 CST 2014
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      When caulking use butyl rubber sealant. Silicon will corrode any galvanizing on the body. ......The holes on the roof.....








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        Roof rack grommets . ...sealant 200

        posted by  waginc2u on  Sun Aug 7 06:17 CST 2022
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        I used a threaded rubber nut to reinstall my roof rack. I'm not sure if that's exactly what they're called tho. Is there a way to upload an image?
        The rack holds three surfboards at 75 mph.








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    Roof rack grommets 200

    posted by  Dave Stevens on  Mon Jun 20 02:01 CST 2022
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    last visit: Sun Jan 1 02:36 CST 2012
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    For additional info on the roof rack well nuts (SAE 1/4-20, 1/2" dia, aka. expansion grommets or expansion nuts) used with 245 roof racks in the North American market you may wish to refer to this old thread here
    https://www.brickboard.com/RWD/index.htm?id=1091338
    Although well nuts are readily available at places like Lowes, as noted in that old thread make sure the outside diameter is correct AND that the length (grip range) is relatively short in order to expand close to the shoulder and provide a more positive seal and grip.
    --
    Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now








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    Roof rack grommets 200

    posted by  Kindofhandy on  Mon Jun 20 01:02 CST 2022
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    https://smile.amazon.com/gp/product/B0040CZ2B6

    From the reviews:

    Joe
    5.0 out of 5 stars Excellent replacement
    Reviewed in the United States on January 28, 2018
    Verified Purchase
    Good quality. This is the proper replacement for the roof rack well nuts on my 1990 Volvo 240 Wagon.
    3 people found this helpful








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    Roof rack grommets 200

    posted by  machine man on  Sun Jun 19 19:35 CST 2022
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    last visit: Wed Oct 22 15:40 CST 2014
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    Hi,

    I believe I have heard of them being referred to as “well nuts.”
    It might be an industrial name or a body shop term used among those tradesmen.

    Sorry I cannot help more but I have never owned a roof rack.
    Never needed to study how their systems work either.
    You may have to research into that name and use “rubber” or “neoprene” to see what pops.

    Phil







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