don't laugh but i have to ask

now this may sound really stupid, but i have searched and can't find it (i guess its well known). i am buy a set of cragar soft 8's with 4.75b/s and i don't know what size lug nut to buy. i am getting them off summit so if anyone could help that would be great. oh and do i need to get valve stems also?

the thread size is 1/2"-20

thanks, so any ideas on the valve stems or should those just come with the tires

The place that mounts your tires will install them for a couple of bucks.