1/2" X 18" Pipe Nipple, Stainless Steel Schedule 40 Threaded Both End (TBE) NPT 316/316L SS
  
  - The Nipple Threads are National Pipe Thread (NPT), also known as American National Standard Taper Pipe Thread.
  - This is the common thread used for threaded pipe connections in the United States.
  - NPT is defined by ANSI/ASME standard B1.20.1