What is the difference between Tapered and Parallel Thread?

In this video, you’ll learn the key differences between parallel and tapered threads, how they are used, and how to identify them correctly. Topics Covered Male & Female Threads Thread Anatomy Threads Per Inch Thread Standards: American NPT British BSPT BSPP Thread Damage (Galling) PTFE Tape & Sealants Applying PTFE Tape