Locking nuts. These are nylon insert lock nuts, as you can see here.
They have a nylon insert (that's why they call them nylon insert).
What happens is, when you put the nut through-I'm sorry, the bolt through, it starts to thread the nylon.
Then it puts pressure on the screw and prevents it from vibrating loose.
To the left, I have a finish nut, and to the right, I have a jam nut.
Jam nuts, just to tell 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. Use them together; you tighten them up, but typically, that's how they are used.
They're also used in tight areas where you can't use a full-sized nut.
They call this a Stover or prevailing torque locking nut.
So it has a locking mechanism that's built into this cone.
As you put it on it starts to act like a locking nut.
This is a two-way nut. So how do you tell it's a two-way nut? There's a little marking in the center, see it there?
It's almost like a punch right in the center. That shows that that's a two-way.
So it's locking two-way, no matter if you put it on or off.
Once you start to screw up to that size it will start to lock.
So I just reached it now. I'm not going to continue, but either way I put this on, it's going to start locking.
A serrated flange nut. This is a nut that has an integral flange built into it.
And on the backside, you can see that it's serrated.
That's usually used in applications where you have some type of metal sheeting or something that has metal,
and you tighten it down, and those serrations prevent it from backing off.
This is called a k-lock nut or Keps lock nut.
These have these little wings that are here. This is a free-rolling washer lock nut.
So those little wings get tightened, and the key to this is not to over tighten it.
Once you over tighten this, it's no longer a lock nut, and that free rolling washer gets crushed, and it just doesn't work for you anymore.
So the key to this is not to torque it down too tight.
A castle nut. These are typically used in cars where you find them on axles when they hold on wheels and bearings.
We're going to drill out a bolt, slide the cotter pin in, to show you how this is locked in place.