Type of bulkhead (wet side + dry side) - threaded + threaded; threaded + slip or slip

[byee]

The threads are not damaged. I took my return and a spare MPT SLIP to JL this morning to test fit. They were all really tight.

Teflon tape is wrapped clockwise, basically in the same direction as tightening the return.

Im shying away from using wrenches to tightening just in case I need to remove for maintenance.

Thanks for the insight.