Press on type nut?

[fullmetaljacket]

What are these types of press on/twist on retaining nuts properly called?
They don't screw on, but rather they wedge themselves into place using their wings that spread and latch on like claws. Possibly only to be used once.

Thank you in advance.

 

[threewood]

Starlock washers.

 

[fullmetaljacket]

Starlock washers.

Thank you.

 

[Tinker67]

Ace hardware has a good selection of them.

 

[fullmetaljacket]

Just looked into it deeper. Not called star lock, (Thank you though) those are single washers or nuts with star lock type washers wedged together as a single unit.
What I was looking for are called Push Nuts.

I think I found them over at Ace as it was mentioned here. Thank you guys.

 

[ckessel]

x2 on Pushnut. Just looked on McMaster Carr.
McMaster-Carr