Capping off bulkhead hole

[robert]

Originally Posted by Vancouver Reefer

Bulkhead with a plug in it is the safest, easiest and quickest to do.

Place bulkhead with threads protruding into the tank, make sure you get a bulkhead with threads on the inside:

I've done similar thing in the past - positioning the bulkhead with threads protruding outside of the tank and using slip on plug, not threaded one. If I just do what you suggest, what end I put the gasket on then? Per manufacturer instructions it should be be outside the tank, since it shouldn't be placed on the side where bulkhead nut is. Am I correct?