RE: [DML] Re: M5 Rivnuts (Fiberglass filler for installing new?)
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RE: [DML] Re: M5 Rivnuts (Fiberglass filler for installing new?)

Hi Dave,


Actually Dave what I'm calling a "ribbed aluminum Riv-nut" is exactly that.
It has a solid body but ribbed sides that provide more grip. These are
stronger than either "jack-nuts" or "well-nuts" which "Mr. G" correctly
identifies as such. Jack-nuts have four open ribs quite like, as you said,
an expansion nut but are therefore WEAKER than Riv-nuts. Well-nuts are
rubber except for the threads and are the weakest of all. Whoever told you
that Riv-nuts are not intended for fiberglass must not have been talking to
the engineers at DeLorean and Lotus back in the eighties :)  You usually get
your talking points right so we can just agree to disagree on these small
matters! I'll send you a "ribbed Riv-nut" if you want to see what Travis and
I are really talking about and then you'll understand they are not the same
as Jack-nuts.


Rob Grady,


P.J.Grady Inc.



From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx] On Behalf Of
Sent: Sunday, January 24, 2010 4:20 PM
To: dmcnews@xxxxxxxxxxxxxxx
Subject: [DML] Re: M5 Rivnuts (Fiberglass filler for installing new?)



Mr. G's Enterprises. Sells all kinds of hardware. http://www.mrgusa.
<> com/pdfs/63jacknut.pdf
He will sell one at a time with no minimum quantites. What you are calling
"ribbed aluminum riv-nuts are what he calles jack nuts. They work like the
expansion anchors you use in sheet rock. Much stronger than riv-nuts,
especially in fiberglass and the size of the hole is not as critical.
Riv-nuts are really only intended for metal, not fiberglass. Lotus uses them
all over, not riv-nuts. The only real problem with riv-nuts AND jack-nuts is
that they corrode. Once that happens it starts turning in the fiberglass.
Jack-nuts tend to break apart and you can force them out easier than
riv-nuts when they corrode. Another interesting thing about jack-nuts is you
can get by without a special tool to install them. A bolt and some washers
can do it.
David Teitelbaum

--- In dmcnews@yahoogroups <> .com,
<rob@...> wrote:
> Travis hit the nail on the head! Consider using the oversize ribbed
> riv-nuts from McMaster Carr and you won't have to do any fiberglass work.
> That is what we do in the shop as it saves time and is stronger than the
> original riv-nut. BTW David jack-nuts are used for the rear license plate
> but aren't really suitable for fiberglass work. Now a question for you
> David..who is Mr. G anyway :-) ?
> Rob Grady,
> P.J.Grady Inc.
> _____ 
> From: dmcnews@yahoogroups <> .com
[mailto:dmcnews@yahoogroups <> .com] On
Behalf Of
> jtrealtywebspannet
> Sent: Wednesday, January 20, 2010 9:39 AM
> To: dmcnews@yahoogroups <> .com

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