Our 45-Degree MJIC adapters are fittings designed to connect hydraulic systems at a 45-degree angle, using JIC (Joint Industry Council SAE J514) connections. These adapters feature male and female components with 37° tapered seats, commonly used in fluid power systems, particularly for hose end connections. The seal is made when the male flared fitting makes contact with the female coned seat, creating a reliable, leak-proof mechanical connection. While SAE J512 45° connections are typically used in automotive and refrigeration systems, the JIC style sold on OneHydraulics.com is the 37° version. It’s important to note that SAE 37° and SAE 45° fittings share the same thread sizes, but the seat angles differ, so intermixing them can result in leakage. Always ensure the correct seat angle is used to maintain a secure, leak-free connection.