OEM wheel bolts

[Russ59]

Do OEM wheel bolts have a tapered seat or a flat seat?
I need to put my original wheels back on for the winter but don't know if I have thrown my OEM bolts away by mistake
I have a set of bolts with a taper seat but don't know if they are my sons old Astra ones. My after market ones have a taper seat aswell.
All the ones I can see on the net are taper seat.
My OEM wheels are the 17" clover leaf shape and seem to have a flat bottom to the bolt hole.
Will I be safe using the taper bolts?

Any help appreciated.

 

[simonlpearce]

Fairly sure they are all tapered to centre the wheel.

 

[Russ59]

Sorted.
Used my aftermarket bolts, the bolt holes do have a slight taper.

 

[Mister T]

60 degree taper, the same as most aftermarket wheels.