Best way to plug an oil pan flange?
 

My '99 NB is currently boosted but I think I am going to take the turbo kit off and build the car for spec miata racing. This being said, my oil pan is currently drilled and tapped with a flange in it so I was wondering what is the best way to plug it once I take the lines out? Should i just put a bolt in there? The fix only has to be temporary as I just need to be able to daily the car for a little while until I can put a new oil pan on.

yep short bolt will work

Okay cool thanks. Should I also put any sort of sealant around the bolt such as silicone or something?

not unless the bolt or the threads around it suck.
this would be just like your drain bolt. add a washer for dramatic effect

Alright will do. Thanks again

use a copper one.