What is that component called that a dc plug plugs into on the circuit board?

Question

That answer got me close but I still can't find it, its the female part that the male part in this picture goes into http://www.cctvcamerapros.com/ProductDetails.asp?ProductCode=PT-3&click=15&utm_source=google_base&utm_medium=shop

Answer 1

It is called a 2.1 mm chassis mount dc power jack. The  link is to exactly what you are asking for, it's about half way down the page.

The model 31-155-0 has a built in switch which will interupt battery power when you plug into it.  the model 31-133-0 is the same thing without the built in switch.

Answer 2

You probably want some sort of DC power jack like here:

http://www.thesalestag.com/index.php?mai...

Answer 3

You're probably thinking of a coaxial power jack or connector.  Round with a pin in the center.