Leaky plug on master cylinder. Replace or repair?

This is picture of the bottom of my master brake cylinder to my '65 Dodge Dart. Brake fluid is leaking around the brass colored plug that screws into the bottom.

Obviously I need to get the leak fixed. So before I run off to NAPA to get a new plug I was wondering if it would be worth the trouble to try and work with the current plug? Is there some sort of tape or sealer I could use on the threads of the current plug that would seal the leak but not affect the brake fluid? Something like plumbers tape? Or should I just go get new plug and install it?

Any experienced hands have an idea?



Glenn