Anvil 339-STL-W-66PK-66-BLK-1/2 Niple. Anvil 339 is a 1/2 inch black standard schedule 40 pipe nipple. It is recommended that a pipe thread sealent and teflon should be used for optimal adhesion to another fitting.
Schedule 80 Black pipe
Teflon Tape and a Thread Sealant should be used to secure fitting correctly.