Weird Screw head - Help!

[kima2904]

Hi there,
I have bought myself a new set of car speakers (front) and went to undo the old ones, and they are held in by the weirdest screw/bolt thingy! It has a round hole in the top of it. What kind of tool do i need to undo it!? Please someone help me

 

[big-all]

has it got a six sided hole as in hex key
or do one of these look like they will fit
http://www.screwfix.com/app/sfd/cat/pro.jsp?id=18983&ts=07317

 

[kevplumb]

or look here

 

[kima2904]

No it doesn't look like any of those. I can't even imagine how it can be a screw. It looks like it's almost been 'punched' in with a gun or something. It's just completely round, about a mm in diaphragm. definately not a hex.
Thanks guys anyway!!

 

[breezer]

i bet its a rivet, if it is drill it out

 

[big-all]

probably as breezer says a rivet

try scratching the "the dome "if it scratches easy that a rivet

 

[Bylough]

Well is it an excentric hole?

 

[petewood]

Well is it an excentric hole?

Reminds me of a girl I knew.

 

[olly_k]

may be somthing simple as a plastic rivet? try getting somthing sharp under and levering off?

 

[Bylough]

OK petewood- makes a change from a left hand thread!
Should have said 'eccentric' (could design a tool for that)