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Posted by dpb on May 31, 2007, 7:26 pm
wrote:
>
>
>
>
> > This is a very minor issue, but this group gives such great advice I
> > thought I'd ask anyway.
>
> > The metal nuts and washers securing the grill on the outside unit of my
> > heat pump rust over time. Not a big a deal. I just replace them.
>
> > However, I was wondering if I could use nylon washers and nuts instead.
> > They wouldn't rust and they might help to dampen vibrations from the
> > grill. Right now there is a metal flat washer, a lock washer, and a
> > nut. I didn't see any nylon lock washers so I'd be using a nylon flat
> > washer, a metal lock washer, and a nylon nut,
>
> > Here's a picture of the outdoor unit and the nylon washers and nuts.
>
> >http://i108.photobucket.com/albums/n39/wgdus/Heat-pump-fan-grill.jpg
>
> >http://i108.photobucket.com/albums/n39/wgdus/Nylon-washers-nuts.jpg
>
> > In general, are nylon fasteners just as good (or better?) than metal
> > for outdoor applications subject to weather?
>
> they will break down from the uv.
The white/natural nylons will, but I would expect the black nylon will
last quite some time. The nylon is pliable enough it will hold w/o
the lock washer I think.
Alternatively, you might look at replacing the bolt/nut w/ a expansion
stud like used on automotive panels. Might be an issue if the panel
must be solidly bolted to avoid vibration noise.
SS obviously is one alternative, of course, agreed...
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