what is the name of

[Folate]

the little rubber stopper that I need to complete the wiring of my fan. My Fantech Fr150 needs a power cord. I also need the little rubber stopper that fits in the hole of the electrical box of the fan. I'm under the impression it is to prevent the dislocation of the connection wires.
Where would I find this in a hardware store.
I'm stumped!
Folate

 

[bayarea925]

Grommet ?

 

[Jhhnn]

Like this-

http://www.zoro.com/g/00062299/k-G0...hopping_Feed&gclid=COqmosWIlL8CFcI7MgodBS4AWg

Also from Home Despot, Lowes, good hardware stores.

 

[Ickis]

Electrical department at Lowes, Home Depot or a hardware store. It is a wiring grommet.

They keep moisture out and prevent the wires from rubbing against metal and getting damaged.

 

[Folate]

I am not at a loss for words right now, thats exactly what I am after.
Many thanks peeps!
Folate