This one I have, this is called a tri-groove nut. It has three grooves on it: one two three.
There's three grooves on here. This is a security nut.
This is to prevent anybody from trying to put a wrench on it,
it's very hard to put a wrench on it, never mind pick it up, but
it's hard to put a wrench on this nut.
You could probably put a vice grip on it and It'll hold it and you'll get it off
but it's really a deterrent for anybody walking by who wants to try and take something.
That's what it's mainly used for.
It takes a special socket, that clips, that goes over this nut and locks
into those three grooves to be able to tighten it on.
Now I'm going to demonstrate the installation of a tri-groove nut.
This is a security nut.
So if you want to keep something secure, the
television, whatever it may be from anybody removing it (you can use these).
Tri-groove nuts have these three grooves and you need a special tool or socket to install it.
You can see they have those three grooves in it.
So I'm going to demonstrate this right now, an installation of it.
I'm putting it through my 3/8" steel here.
I'm going to screw it on so it snugs up,
and I'm going to tighten it up with this special tool.
I need a adjustable (wrench) on the other side.
There we go.
Bear with me a minute...there we go.
So I'm going to wedge it against the vice so I don't have
to hold two hands. With these you can
only do so much torquing with it cause
otherwise it wants to skip (cam) out.
Ok, that's the installation of a tri-groove nut.
You can't put anything on this to take it off. It's all round. You have to have this tool to take it off.
That's what's key to this nut. You can put this where you can't get to the head.
There are installations where you won't be able to access the head so you can't put
anything on it but also if you can then,
you would use a security screw with
another type of security fastener or
wrench to put it in place like a Torx
with a pin in the center or something along those lines.
They also have tri-groove bolts also that are available.
I'm not sure if we have them on our website yet but they are available.
You can't take a wrench like this and take it off because what happens is,
it's been designed to where you just slide.
Now let's try the ultimate to get this off: this is a vice grip.
So if anything was going to take it off, it's going to be this.
So let's see if we can do it. I haven't tried this but I'm gonna give it a shot.
I'm trying to grab it on the top ridge of it and I'm gonna try and lock the vise grip;
see if it holds. Nah, see what
happens, once I apply pressure, it starts to slide off.
So let's see if I can get it this way...no.
There's not enough lip on the top to be able to use the vise grip to grab it.
Even this way I can't grab it.
So there's basically no way to get this off unless you have the tool.
It's too smooth, there's nothing for the vice grip to grab.
This is the tool if you're going to use anything to get
this off without having the right tool
which is this socket with the tri-grooves in the socket and that would
take it off and put it on.
I'm going to take it off now. As you can see, you have the right tool...
you can remove it.
And that's my demonstration of a tri-groove security nut.
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