bolts for seats?

[J9HHY]

I am fitting some after market seat during the weekend and was wondering what code the self retaining bolts are on the seats? Where they bolt into floor?

 

[maynard]

you need 12.9 m8 high tensile strength bolts to bolt the aftermarket subframe to the floor of the clio using the original holes in the floor pan and also make sure you use the original nuts too.