[TowerTalk] Nylok nuts
jim.thom at telus.net
Thu Jul 6 16:30:56 EDT 2017
Date: Thu, 6 Jul 2017 11:57:32 -0400
From: "Charles Gallo" <charlie at thegallos.com>
To: "Grant Saviers" <grants2 at pacbell.net>
Cc: towertalk at contesting.com
Subject: Re: [TowerTalk] Nylok nuts
> I use Nord-Lock washers for high vibration or
> "can't loosen" applications when full bolt tension is ok, as split
> ring lockwashers are nearly useless. There are many many choices for
> fastener locking technologies. for some of them check out
If anyone wants to read a really interesting book on this, get a copy of
"Nuts, Bolts, Fasteners and Plumbing"
Probably more than you'd ever want to know about what actually works,
DOESN'T work (hint, split lock washers are basically useless for a
properly torqued connection) and how to prevent things from coming
### I have seldom had issues with split ring lockwashers..and that included vibration.
On a similar note, UST corp uses nylocks all over their towers... like on all 22 x pulleys,
and also where the plates are that are bolted across the width of each top section. Nylocks
## Im going to check out these Nord-locks, at 1st glance, they appear to be the ultimate device.
Somebody mentioned A325 structural bolts. A325 is the same as a SAE- Grade 5 bolt. Beware,
the structural bolt tables will provide for a max TQ rating..depending on whether its..wet...or dry.
Wet means lubricated, and dry means no lube on the threads. HUGE difference. Same deal with
SAE - Grade 8 bolts...and their structural eq. If wet..lubricated... FAR less tq is required. IF you lube
the bolts..and then use the max dry TQ rating, you will trash the bolt threads.
## For stuff like boom splices, or inboard sections of an 80 or 40m rotary dipole..where the typ
.25-20 or .25-28 SS bolt is used, the mating SS nylocks, lubed with never seize, have not given me
## back when I was a kid, nylocks were always called...aircraft nuts..or ..elasticstop nuts. Then
the term..nylock became the norm.
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