The BSPT (tapered) male will mate with a BSPT (tapered) female or a BSPOR (paralled) female.
The BSPT male has tapered threads. When mating with either the BSPT (tapered) female or the BSPOR (parrallel) female port, the seal is made on the threads.
The BSPT connector is similar to, but not interchangable with the NPTF connector. The thread pitch is different in most cases, and the thread angle is 55 ํ instead of the 60 ํ angle found on NPTF threads.