Disco 300TDi Front Seat Bolt Size for Fixing

Hi,

Can anybody tell me what the bolt size for fastening the front seats in a Disco 300TDi are?

I have got an old pair of Disco seats I am putting in my Series 2A, but don't have any bolts lying around which are right, so, before walking into Wickes or Screwfix (the only places open on a Sunday) with a chair i thought i would see if anyone can help me out.

From measurements i am thinking M8?

Thanks,

Mike

M8 with 25mm washers under the floor

Thank you