I know exactly what you mean, but would have to guess at what they're 
called.  I'd call them cable feed-throughs.  Not a great idea, but it's a 
start.  Here's where a good old hardcopy catalog would help, but only if you 
could look at the pictures.

Steve

----- Original Message ----- 
From: "Steve Forst" <[log in to unmask]>
To: <[log in to unmask]>
Sent: March 14, 2015 21:09
Subject: What do you call these things?


> I'm tinkering around with a little project that will have 2  cables
> (like microphone cable size) entering a metal box.    I can use rubber
> grommets to protect the cables, but  they could accidentally pull
> through the grommet.
>
> I could use zip ties, or hot glue, or knot the cable inside the box to
> prevent a pull through, but that's kind of rinkey dink.
>
> I've seen hard plastic things that fit the chassis hole and when the
> cable is passed through, a little thing on the inside clamps down to
> lock the cable.   Anybody know what these things are called?   I'd like
> to look on ebay, but have no idea what item to search for.
>
> Tnx, Steve KW3A
>