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Tim,
Many months ago I weighed the MS21042 "missle nuts" and found them to be
just over one third the weight of the AN365 "essna stop nut".  The missle
nuts come in silver plate (MS21045?), phosphated (black) or cadmium plated
(gold metal color).  They have a smaller bearing surface and should have a
washer at all times.  Dissimilar metals must be considered when choosing a
washer.  I like the silver plated missle nuts for electrical applications.
The MS20364 nut (AN364) is a shear nut and weighs less than the MS20365
(AN365) but I haven't weighed them to see how much less as I seldom use
shear nuts.
Applying anti-sieze to threads and then coating the assembly with LPS-3
(allowed to dry to wax) will help with future corrosion and disassembly.
Douglas Aircraft used to coat the interior belly of their transports with
LPS-3 before laying down the insulation blankets under the baggage floors.
Much less expensive than ACS-50.
Luckily, I bought 650 lbs of "scrap" hardware from Lucas Aerospace at
auction many years ago.  This is hardware which "hit the floor" and could
not be restocked.  It was a bitch to sort but a boon now.  Love those big
airplane guys...
Walter Dodson

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Please send your photos and drawings to marvkaye@olsusa.com.
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