Steel Adapter, 1/4-18 Male NPT Branch To 1/4-18 Female NPT Run, Tee

This Eaton Aeroquip adapter is suitable for use in grease, instrumentation, and most hydraulic systems.

For a 1/4-18 NPT grease line, this fits right in. The branch port is 1/4-18 male NPT and the run ports are 1/4-18 female NPT, so you're splitting off a male-threaded branch into a female-threaded run. It's listed specifically for grease, instrumentation, and general hydraulic systems, so a grease line application is well within what this adapter handles. Eaton Aeroquip builds the 2091 series to NPTF spec on both the external and internal pipe threads, which helps with sealing on tapered pipe connections.

Thread-wise, it’s a 2091 Series steel tee adapter with a 1/4-18 male NPT branch and a 1/4-18 female NPT run, using NPTF external pipe threads and NPTF internal pipe threads.