37 deg JIC hydraulic fittings
Good read, JICFittings.net In short maybe JIC fittings can be repaired.
"...Other companies are now starting to manufacture, and gain recognition of hydraulic fittings, although their popularity is not of rapid growth as JIC are universal World wide, and therefore there are many compatibility issues with new brands of fitting. Leaking joints on JIC Hydraulic fittings can be eliminated by installing a conical washer between the JIC nose and flare. This is a good solution when we refer to machinery that is stationary, but would not be suitable in circumstances where the JIC fitting is being constantly dismantled and reassembled, for example in the delivery of petroleum to gasoline stations. The installing of a conical washer on the JIC Hydraulic fittings, and then a sealant being applied ensures no leakage from the pipe connection.
Leakage of JIC hydraulic fittings also occurs when insufficient torque is used when installing., and can be just as damaging as over tightening, resulting in leakage of the JIC fitting as well as possible distortion of the piping if being used with great pressure levels. Constant vibration of machinery can also cause stress, and then fatigue to the JLC Hydraulic fitting, eventually causing faults and leakage. This type of damage to the JIC hydraulic fittings can be kept to a minimum by the use of flexible hosing, or mountain the machinery in question on a platform or mounting blocks which in turn receive some of the impact of the vibration."