Although both JIC and ORFS hydraulic fittings use straight threads, their sealing mechanisms are quite different. For example, O-ring face seal fittings which go by the name of ORFS Hydraulic Fittings exploit a flat face associated with an O-ring that makes sure they provide a tight seal when used to prevent leaks while operating under high pressures. On the contrary, JIC connectors achieve this through 37 degree flare which is efficient but may work in a different way from ORFS. The decision between using JIC or O-Ring face-seal can be dictated by particular application requirements whereby systems like hydraulics often prefer the superior sealing performance offered by ORFS.