Steel Adapter, 7/16-20 Male JIC 37 deg Flare Hex Plug

This steel adapter is applicable to hydraulic, instrumentation, and chemical processing systems.

For a 1/4 inch tube size JIC 37 degree flare connection, this plug matches that setup. It’s a steel 37 degree flare hex plug with 7/16-20 thread and a 0.25 inch tube O.D. callout, so the sizing lines up for that common 1/4 tube JIC flare.

Blocking off an unused JIC port is exactly what this fitting handles. The 37 degree flare seating surface creates a metal-to-metal seal when torqued down, so fluid can't push past it even under working pressure. You'd use it anywhere you need to cap a live hydraulic circuit, close off an instrumentation tap that isn't in use, or seal a port during testing or reconfiguration. The male JIC thread is 7/16-20, which is the standard for -4 JIC fittings in most hydraulic and instrumentation hydraulic connections.

For capping a 7/16-20 male JIC 37 degree flare connection, this part matches that thread and flare style. It is a straight 37 degree flare hex plug in the Eaton Aeroquip 900599 series.