Removing number plates-security screws

Redsoxfan · 27-03-2008 9:54pm #1

Any idea how to remove security screws? The type that can only be turned clockwise.

Cheers.

P.S. it's my own car I'm not trying to nick someone else's plates!

crosstownk · 27-03-2008 9:57pm

Remove the screw by turning it anticlockwise with another flat head screwdriver under the head of the screw to force it out. The screw most likely has a section below the head without threads (or damaged threads) so you need to pull the screw to engage the threads.

Redsoxfan · 27-03-2008 10:02pm

Cheers-but it seems like I can't grip the head of the screw with a screwdriver to turn it-the 'flanges' are set up in such a way that it can only be turned one way-does that make sense?

I wonder if I could grip the head with a pair of pliers or the like?

crosstownk · 27-03-2008 10:05pm

I've never heard of a 'security screw' for a number plate - I might be corrected on this.....

What I mean is - use a second screwdriver to prise the screw out as you turn it. It may work with a pliers but could be a bit more awkward.

Redsoxfan wrote:

the 'flanges' are set up in such a way that it can only be turned one way

That sounds like threads are not engaging - possibly because the plates were affixed with a drill that may have damaged the threads.

Plug · 27-03-2008 10:07pm

Use a vise grips and then pull and turn anti clock wise.

Lucifer · 27-03-2008 10:41pm

I presume the OP is talking about something like this

While I have never come across one I would assume either gripping with pliers or vice grips would be best option.

crosstownk · 27-03-2008 10:45pm

Lucifer, that screw head has two opposing faces - surely it should work in both directions with a flat head screwdriver........no?

dsane1 · 27-03-2008 10:47pm

try an electrician they use these on outside light fittings too

Lucifer · 27-03-2008 10:54pm

one egde is flat which will grip with a flat head, the other edge is rounded so the screwdriver will slip. Is hard to see but maybe more noticable in these pics

Redsoxfan · 27-03-2008 10:55pm

That's the one Lucifer. Think the pliers/grips is the way to go.

crosstownk · 27-03-2008 10:56pm

Lucifer wrote: »

Is hard to see but maybe more noticable in these pics

Ah yes - I see what you mean. If that's the case then the vise grips is probably the best option for the OP.

Steve · 28-03-2008 2:16am

If you can't get it with a vise grip, try this:
Stick 2 blades side by side in a hacksaw and cut a new slot, remove it with a screwdriver.
You may not have the room to get the hacksaw near enough though.

Next thing I'd try is a centre punch. Make an indent near the edge and then try to hit at a tangent - should work.

If all else fails, the only other way is to drill a small hole in the head of the screw and use a stus extractor (like a tapered tap with a reversed thread on it.)

Rovi · 28-03-2008 11:27am

A tame electrician, electrical engineer, alarm/security engineer would probably have the correct tool for removing these, if you happen to know any anyone in that line of work.

Here are some alternative methods you might try-
http://www.naturalhandyman.com/iip/inffastener/infoneway.html

Removing number plates-security screws

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