nuts?

[bazooka joe]

i need several metric nuts...specifically the ones that hold down the air box to the radiator mounts on the protege5. anyone know the size or where i might get them outside of the dealer. they want like 2.00+ per nut, no kidding, and of course all the have are part #'s no sizes...oh thank you local mazda dealer!!

anyway, if anyone knows the size (i think they are 10mm heads, but what is the thread type?) or where to pick them up, that would be cool! thanks