86 350X Ehaust nut size?

[typikalreason]

i was wondering whats the size of the nut that mounts the exhaust header to the block on a 86 350X. The orinals are a capped off nut. where can i find those?
Thanks

[Erics350x]

servicehonda.com

[Erics350x]

8mm. metric

[typikalreason]

Thanks man