Brass Adapter, 1/2-14 Female NPT To 3/8-18 Female NPT, Straight

This brass adapter is designed for use in hydraulic systems, along with grease, refrigeration, and instrumentation applications. It features female NPTF ends, so it should be compatible with standard NPT fittings of the appropriate size.

Thread-wise, it matches that exactly. One end is 1/2-14 female NPTF and the other end is 3/8-18 female NPTF, and it’s a straight reducer coupling meant to join those two female pipe thread sizes.

Hydraulic systems are one of the listed applications for this adapter, right alongside instrumentation, refrigeration, and grease systems. The brass construction holds up well in demanding environments, and the NPTF threads on both ends are precision-cut to give you a leak-tight connection under pressure. The 1/2-14 side steps down to the 3/8-18 side, so it functions as a reducer coupling between those two pipe sizes.