This is what they call a jam nut. Jam nuts
are about half the size of a regular finish nut in height.
Otherwise the circumference and everything else is the same; they use the same wrench
to apply the nut and to remove the nut.
Jam nuts, just to give you what these do,
you use two nuts together and then you
tighten them up against each other.
That's why they call them jam
nuts: you use them together, you tighten them
up, and I'll show you. I'll do a
demonstration of that also, but typically
that's how they're used.
They're also used in tight areas where you can't have a full-size nut.
So I'm going to demonstrate the installation of the jam
nuts that I have here. I have two of them.
Jam nuts are also called thin nuts.
The difference is that they're about half the size of a regular nut.
You can see that here. I'm going to put
the first one on and then I'm going to
put the second one on.
I'm going to use an adjustable wrench to grab the bottom nut.
Then I'm going to use the ratchet on the top to tighten it up.
Now I'm tighten them up against each other.
That's one of the reasons why they call
them jam nuts. Jam nuts are also available
in nylon lock nuts where you don't have
to use this situation. Obviously jam nuts
can be used in many different
applications such as: if you have a tight
area like in a car application where you
don't have the room to use a
regular sized nut. They'll use jam nuts or
a single jam nut to get on the back of
an alternator for a bracket; something
along those lines. They also use the
nylons in that situation. So there's many
different situations that you can use
this in. They also sometimes want to put
a jam nut like this to where wherever
it's keeping in place. They want
this whole mechanism to be able to turn
and move because they might be a moving
arm on this bolt holding it in place.
They also are used with shoulder bolts.
You'll find jam nuts used with
shoulder bolts a lot on mechanical equipment.
However you should know that
if this is being used in a vibrating
machine or something along those lines,
these do have a tendency to loosen apart.
So if you want them to stay use some Loctite (Threadlocker Solution)
or some other locking product to keep
them in place like they are here. And that's it.
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