JIC Fittings — 37° Flare (Joint Industry Council) Guide
How to identify JIC (Joint Industry Council) fittings: compression fittings defined by SAE J514 with a 37° flare seating surface and parallel threads that seal metal-to-metal.
Other fitting tiles
Joint Industry Council fittings, defined by SAE J514, are compression fittings machined with a 37 degree flare seating surface and parallel threads. They are commonly manufactured in nickel alloys, brass, carbon and stainless steel.
JIC Fitting hydraulic connections are common in most fluid power systems. Both male and female components have 37° seats.
How to identify JIC
- A 37° flare seating surface on both the male and female components.
- Parallel (straight) threads — the thread diameter does not taper.
- Defined by the SAE J514 standard.
How JIC seals
The seal is made by establishing contact between the male flared and the female coned seat. This is considered a mechanical connection.
A mechanical, metal-to-metal seal
A JIC connection seals on the 37° seat, not on the threads, so no thread sealant or O-ring is required. The leak-tight seal comes from the male 37° flare seating firmly against the female 37° coned seat as the connection is tightened.
Tubing assembly components
There are three components that make a tubing assembly:
- fitting
- flare nut
- sleeve
Materials
JIC fittings are commonly manufactured in:
- Nickel alloys
- Brass
- Carbon steel
- Stainless steel
Common applications
JIC fitting hydraulic connections are common in most fluid power systems, used across a wide range of industrial and mobile hydraulic equipment.
